Prepare for release (#163)

* tm syntax: remove verification behind command
It surely has been useful in early stage of the syntax
but it's seems to have no impact now

* tm syntax: add variable fields in "variables"
get rid of non-fixed text width lookbehind, incompatible with PCRE regex

* update changelog for 1.6.0

* updates for 1.7.1 release

---------

Co-authored-by: Gabin Lefranc <gabin.lefranc@gmail.com>

Author: fdncred

CHANGELOG.md

@@ -153,3 +153,6 @@ All notable changes to the "vscode-nushell-lang" extension will be documented in
   - Update link (@balupton) [#149](https://github.com/nushell/vscode-nushell-lang/pull/149)
   - Fix shebang detection (@adamcstephens) [#151](https://github.com/nushell/vscode-nushell-lang/pull/151)
   - use `which` to find `nu` + add icon (@nerditation) [#153](https://github.com/nushell/vscode-nushell-lang/pull/153)
+- 1.7.1
+  - Update to nushell 0.85.0 (@fdncred) [#155](https://github.com/nushell/vscode-nushell-lang/pull/155)
+  - update textmate `def --env`, `def --wrapped`, input/output types (@glcraft) [#160](https://github.com/nushell/vscode-nushell-lang/pull/160)

client/package-lock.json

@@ -3,7 +3,7 @@
   "displayName": "vscode-nushell-lang",
   "description": "nushell language for vscode",
   "author": "The Nushell Project Developers",
-  "version": "1.7.0",
+  "version": "1.7.1",
   "preview": false,
   "license": "MIT",
   "publisher": "TheNuProjectContributors",