Bumps [acorn](https://github.com/acornjs/acorn) from 5.5.3 to 5.7.4. **This update includes a security fix.**
- [Release notes](https://github.com/acornjs/acorn/releases)
- [Commits](https://github.com/acornjs/acorn/compare/5.5.3...5.7.4)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [select2](https://github.com/select2/select2) from 4.0.12 to 4.0.13.
- [Release notes](https://github.com/select2/select2/releases)
- [Changelog](https://github.com/select2/select2/blob/develop/CHANGELOG.md)
- [Commits](https://github.com/select2/select2/compare/4.0.12...4.0.13)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [tinymce](https://github.com/tinymce/tinymce-dist) from 5.1.5 to 5.2.0.
- [Release notes](https://github.com/tinymce/tinymce-dist/releases)
- [Changelog](https://github.com/tinymce/tinymce-dist/blob/master/changelog.txt)
- [Commits](https://github.com/tinymce/tinymce-dist/compare/5.1.5...5.2.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [inputmask](https://github.com/RobinHerbots/Inputmask) from 5.0.1 to 5.0.3.
- [Release notes](https://github.com/RobinHerbots/Inputmask/releases)
- [Changelog](https://github.com/RobinHerbots/Inputmask/blob/5.x/CHANGELOG.md)
- [Commits](https://github.com/RobinHerbots/Inputmask/compare/5.0.1...5.0.3)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [tinymce](https://github.com/tinymce/tinymce-dist) from 5.1.4 to 5.1.5.
- [Release notes](https://github.com/tinymce/tinymce-dist/releases)
- [Changelog](https://github.com/tinymce/tinymce-dist/blob/master/changelog.txt)
- [Commits](https://github.com/tinymce/tinymce-dist/compare/5.1.4...5.1.5)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [eslint](https://github.com/eslint/eslint) from 6.7.2 to 6.8.0.
- [Release notes](https://github.com/eslint/eslint/releases)
- [Changelog](https://github.com/eslint/eslint/blob/master/CHANGELOG.md)
- [Commits](https://github.com/eslint/eslint/compare/v6.7.2...v6.8.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [inputmask](https://github.com/RobinHerbots/Inputmask) from 5.0.0 to 5.0.1.
- [Release notes](https://github.com/RobinHerbots/Inputmask/releases)
- [Changelog](https://github.com/RobinHerbots/Inputmask/blob/5.x/CHANGELOG.md)
- [Commits](https://github.com/RobinHerbots/Inputmask/compare/5.0.0...5.0.1)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [tinymce](https://github.com/tinymce/tinymce-dist) from 5.1.3 to 5.1.4.
- [Release notes](https://github.com/tinymce/tinymce-dist/releases)
- [Changelog](https://github.com/tinymce/tinymce-dist/blob/master/changelog.txt)
- [Commits](https://github.com/tinymce/tinymce-dist/compare/5.1.3...5.1.4)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [tinymce](https://github.com/tinymce/tinymce-dist) from 5.1.2 to 5.1.3.
- [Release notes](https://github.com/tinymce/tinymce-dist/releases)
- [Changelog](https://github.com/tinymce/tinymce-dist/blob/master/changelog.txt)
- [Commits](https://github.com/tinymce/tinymce-dist/compare/5.1.2...5.1.3)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [eslint](https://github.com/eslint/eslint) from 6.7.1 to 6.7.2.
- [Release notes](https://github.com/eslint/eslint/releases)
- [Changelog](https://github.com/eslint/eslint/blob/master/CHANGELOG.md)
- [Commits](https://github.com/eslint/eslint/compare/v6.7.1...v6.7.2)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [eslint](https://github.com/eslint/eslint) from 6.6.0 to 6.7.1.
- [Release notes](https://github.com/eslint/eslint/releases)
- [Changelog](https://github.com/eslint/eslint/blob/master/CHANGELOG.md)
- [Commits](https://github.com/eslint/eslint/compare/v6.6.0...v6.7.1)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [tinymce](https://github.com/tinymce/tinymce-dist) from 4.8.3 to 5.1.2.
- [Release notes](https://github.com/tinymce/tinymce-dist/releases)
- [Changelog](https://github.com/tinymce/tinymce-dist/blob/master/changelog.txt)
- [Commits](https://github.com/tinymce/tinymce-dist/compare/4.8.3...5.1.2)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [inputmask](https://github.com/RobinHerbots/Inputmask) from 4.0.8 to 4.0.9.
- [Release notes](https://github.com/RobinHerbots/Inputmask/releases)
- [Changelog](https://github.com/RobinHerbots/Inputmask/blob/4.0.9/CHANGELOG.md)
- [Commits](https://github.com/RobinHerbots/Inputmask/compare/4.0.8...4.0.9)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [select2](https://github.com/select2/select2) from 4.0.10 to 4.0.12.
- [Release notes](https://github.com/select2/select2/releases)
- [Changelog](https://github.com/select2/select2/blob/develop/CHANGELOG.md)
- [Commits](https://github.com/select2/select2/compare/4.0.10...4.0.12)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [eslint](https://github.com/eslint/eslint) from 6.5.1 to 6.6.0.
- [Release notes](https://github.com/eslint/eslint/releases)
- [Changelog](https://github.com/eslint/eslint/blob/master/CHANGELOG.md)
- [Commits](https://github.com/eslint/eslint/compare/v6.5.1...v6.6.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [eslint](https://github.com/eslint/eslint) from 6.5.0 to 6.5.1.
- [Release notes](https://github.com/eslint/eslint/releases)
- [Changelog](https://github.com/eslint/eslint/blob/master/CHANGELOG.md)
- [Commits](https://github.com/eslint/eslint/compare/v6.5.0...v6.5.1)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [eslint](https://github.com/eslint/eslint) from 6.4.0 to 6.5.0.
- [Release notes](https://github.com/eslint/eslint/releases)
- [Changelog](https://github.com/eslint/eslint/blob/master/CHANGELOG.md)
- [Commits](https://github.com/eslint/eslint/compare/v6.4.0...v6.5.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [select2](https://github.com/select2/select2) from 4.0.8 to 4.0.10.
- [Release notes](https://github.com/select2/select2/releases)
- [Changelog](https://github.com/select2/select2/blob/develop/CHANGELOG.md)
- [Commits](https://github.com/select2/select2/compare/4.0.8...4.0.10)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [inputmask](https://github.com/RobinHerbots/Inputmask) from 4.0.2 to 4.0.8.
- [Release notes](https://github.com/RobinHerbots/Inputmask/releases)
- [Changelog](https://github.com/RobinHerbots/Inputmask/blob/5.x/CHANGELOG.md)
- [Commits](https://github.com/RobinHerbots/Inputmask/compare/4.0.2...4.0.8)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [eslint](https://github.com/eslint/eslint) from 6.3.0 to 6.4.0.
- [Release notes](https://github.com/eslint/eslint/releases)
- [Changelog](https://github.com/eslint/eslint/blob/master/CHANGELOG.md)
- [Commits](https://github.com/eslint/eslint/compare/v6.3.0...v6.4.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [eslint](https://github.com/eslint/eslint) from 6.2.2 to 6.3.0.
- [Release notes](https://github.com/eslint/eslint/releases)
- [Changelog](https://github.com/eslint/eslint/blob/master/CHANGELOG.md)
- [Commits](https://github.com/eslint/eslint/compare/v6.2.2...v6.3.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [less](https://github.com/less/less.js) from 3.9.0 to 3.10.3.
- [Release notes](https://github.com/less/less.js/releases)
- [Changelog](https://github.com/less/less.js/blob/master/CHANGELOG.md)
- [Commits](https://github.com/less/less.js/compare/v3.9.0...v3.10.3)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [eslint](https://github.com/eslint/eslint) from 6.1.0 to 6.2.2.
- [Release notes](https://github.com/eslint/eslint/releases)
- [Changelog](https://github.com/eslint/eslint/blob/master/CHANGELOG.md)
- [Commits](https://github.com/eslint/eslint/compare/v6.1.0...v6.2.2)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [eslint-utils](https://github.com/mysticatea/eslint-utils) from 1.4.0 to 1.4.2. **This update includes a security fix.**
- [Release notes](https://github.com/mysticatea/eslint-utils/releases)
- [Commits](https://github.com/mysticatea/eslint-utils/compare/v1.4.0...v1.4.2)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [eslint](https://github.com/eslint/eslint) from 5.7.0 to 6.1.0.
- [Release notes](https://github.com/eslint/eslint/releases)
- [Changelog](https://github.com/eslint/eslint/blob/master/CHANGELOG.md)
- [Commits](https://github.com/eslint/eslint/compare/v5.7.0...v6.1.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [select2](https://github.com/select2/select2) from 4.0.5 to 4.0.8.
- [Release notes](https://github.com/select2/select2/releases)
- [Changelog](https://github.com/select2/select2/blob/develop/CHANGELOG.md)
- [Commits](https://github.com/select2/select2/compare/4.0.5...4.0.8)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [less](https://github.com/less/less.js) from 3.8.1 to 3.9.0.
- [Release notes](https://github.com/less/less.js/releases)
- [Changelog](https://github.com/less/less.js/blob/master/CHANGELOG.md)
- [Commits](https://github.com/less/less.js/compare/v3.8.1...v3.9.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [gulp](https://github.com/gulpjs/gulp) from 4.0.0 to 4.0.2.
- [Release notes](https://github.com/gulpjs/gulp/releases)
- [Changelog](https://github.com/gulpjs/gulp/blob/master/CHANGELOG.md)
- [Commits](https://github.com/gulpjs/gulp/compare/v4.0.0...v4.0.2)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [gulp-sourcemaps](https://github.com/gulp-sourcemaps/gulp-sourcemaps) from 2.6.4 to 2.6.5.
- [Release notes](https://github.com/gulp-sourcemaps/gulp-sourcemaps/releases)
- [Commits](https://github.com/gulp-sourcemaps/gulp-sourcemaps/compare/v2.6.4...v2.6.5)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [require-dir](https://github.com/aseemk/requireDir) from 1.1.0 to 1.2.0.
- [Release notes](https://github.com/aseemk/requireDir/releases)
- [Changelog](https://github.com/aseemk/requireDir/blob/master/CHANGELOG.md)
- [Commits](https://github.com/aseemk/requireDir/compare/1.1.0...1.2.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [tar](https://github.com/npm/node-tar) from 4.4.1 to 4.4.10. **This update includes security fixes.**
- [Release notes](https://github.com/npm/node-tar/releases)
- [Commits](https://github.com/npm/node-tar/compare/v4.4.1...v4.4.10)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Fixes #2581.

- jQuery to version v3.3.1
- Bootstrap-datetimepicker to v2.4.4
- jQuery mousewheel to v3.1.13
- Inputmask to v3.2.7
- jquery-sortable to v 0.9.13
- Remove jQuery UI from our static files. It has not been used for a long time in core.

Inputmask has a newer version but it doesn't work in the way that we use it. We will need to upgrade that separately later.

Use npm and gulp to manage the static files for all these dependencies.

Also remove deprecated `charset` and redundant `type` attributes from all script tags.

Also use npm to manage the dependency, and gulp to copy the files into our static directories.