Merge alexheretic/atom-languageclient/tree/build to support ide-rust

[aminya]

We need to merge the changes by @alexheretic from this branch, so ide-rust can switch to our fork
https://github.com/alexheretic/atom-languageclient/tree/build
https://github.com/atom-community/atom-languageclient/tree/ide-rust-build-no-rebuild (cleaned version)

• definitions for out-of-project files -> feat: support out of the project files #160
• Add shutdownServersGracefully() config function -> feat: allow disabling shutdownGracefully #161
• Fix completion deleting the triggerChar - already fixed in fix: fix autocomplete prefix #114
• Implement completion additionalTextEdits -> feat: apply additionalTextEdits after completion #162
• Support non-boolean *Provider server capabilities -> already fixed
• send codeActionLiteralSupport -> Add missing code action functions for ide-rust  #167
• Support custom filterCodeActions & onApplyCodeActions -> Add missing code action functions for ide-rust  #167

Allows fixing rust-lang/atom-ide-rust#175

[github-actions]

🎉 This issue has been resolved in version 1.14.0 🎉

The release is available on:

• GitHub release
• npm package (@latest dist-tag)

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