update tmLang and prepare for release (#208)

Author: fdncred

CHANGELOG.md

@@ -171,3 +171,13 @@ All notable changes to the "vscode-nushell-lang" extension will be documented in
   - Remove / and \ from wordPattern [#186](https://github.com/nushell/vscode-nushell-lang/pull/186)
   - Add support for def my-function syntax highlighting and add tests to it [#182](https://github.com/nushell/vscode-nushell-lang/pull/182)
   - add prettier to dev deps [#181](https://github.com/nushell/vscode-nushell-lang/pull/181)
+- 2.0-pre-release
+  - Syntax highlighting in markdown code blocks [#195](https://github.com/nushell/vscode-nushell-lang/pull/195)
+  - Fix vulnerabilities detected by npm audit [#193](https://github.com/nushell/vscode-nushell-lang/pull/193)
+  - Add CONTRIBUTING.md [#194](https://github.com/nushell/vscode-nushell-lang/pull/194)
+  - Support raw strings [#197](https://github.com/nushell/vscode-nushell-lang/pull/197)
+  - Remove irrelevant autoClosingPair /\*\* [#198](https://github.com/nushell/vscode-nushell-lang/pull/198)
+  - Improve highlighting of bare and raw strings, and add missing unit & operator [#199](https://github.com/nushell/vscode-nushell-lang/pull/199)
+  - Add operators 'has' & 'has-not', and shorten operators-word regex [#201](https://github.com/nushell/vscode-nushell-lang/pull/201)
+  - Support floats, binary & octal literals (with underscores) [#200](https://github.com/nushell/vscode-nushell-lang/pull/200)
+  - Use LSP instead of legacy --ide-\* parameters [#207](https://github.com/nushell/vscode-nushell-lang/pull/207)