Updates LJM to 2e1436e20d which includes
the ICE failed notification logic.

Co-authored-by: DimaG <dgeorgiev06@gmail.com>

We no longer need it since Rect 16 takes care of passing the context around.
It's also deprecated: https://atlaskit.atlassian.com/packages/core/layer-manager

- bump expose-loader to 0.7.5
- remove unused file-loader

NOTE: The first incarnation of this commmit also removed string-replace-loader,
but alas lib-jitsi-meet lists it as a devDependency so it's not installed and we
are currently running webpack on install. This is arguably wrong, but that's a
discussion for another day.

- Change the existing overrides to move the flags
  so the first flag does not cover the toolbar.
- Add a new override to disable the slide in
  animation, as it will play for each flag once
  it becomes the first flag--instead of playing
  only once when the flag queue has items.

The package now requires using a ModalTransition component
to handle animations. The existing DialogContainer component
has been split into native and web implementations to support
this change.

The avid reader may notice we have switched to using our own fork. That is
indeed the case. The upstream author hasn't maintained the library in months,
and changes to the Android build system are required at this point, hence the
fork.

Bumping React to 16.6.3 is a requirement for this update.

* chore(deps): bump lib-jitsi-meet

Brings in a fix for getDisplayMedia being moved onto
navigator.mediaDevices and a hack fix for SDP
interop between Chrome and Firefox.

* Update package lock file sed/http/https.

* Replaces smileys and the logic of replacing links/emails.

Now using react-emoji-render and react-linkify.

* Fixes heart emoji.

It is known that current implementation doesn't work with ascii emojis that contain < or >, like >:( >:-( </3 <\3 <3. Making those work may bring some xss issues.

* Adds '_blank' and 'noopener noreferrer' to the replaced links.

* Fixes package-lock links (http vs https).

* Fixes comments.

The upstream package has been unmaintained for 2 years now, and making the litle
changes needed as React Native needs them is getting old. The actual
funcionality is a couple of one-liners plus tons of boliterplate, which gets
reduced by quite a bit if we just embed it. So here it goes.

Introduces the sdpSemantics configuration option.

This is required to get rid of a warning after react native update. See related commit in lib.

None of the breaking changes seemed to affect current
usage of react-i18next and light testing of features
and language switching did not produce issues.

This update is a pre-requisite for removing deprecated react
lifecycle methods, as older versions of react-i18next
have a higher order component that uses the deprecated
componentWillMount, and that issue has been fixed since 7.8.0.

Updates LJM to fix grey overlay with "user is having connectivity
issues" caused by remote track overwrite.