Upgrade elixir_sense (#812)

Elixir sense was doing a compile-time check for a certain feature,
and since Lexical is built on an older version of elixir than it often
runs on, the check ended up being wrong. We submitted a PR to
elixir_sense and now can fix the bug.

Updated documentation for 0.7

Updated changelog

Updated Changelog

Fixed unused variable code action (#628)

The quote character around the variable name was changed, this broke
the code action for replace unused variables.

Removed -e option (#616)

The -e option exits immediately on an error, which will cause the
command to exit if no version manager is detected. This means we won't
try to invoke elixir from the path.

From my limited knowledge of bash, it looks like this command was
added in error.

Fixes #615

updated deps

Version 0.4.1

Version 0.4.0

Version 0.3.3