Update changelog

Author: DustinCampbell

CHANGELOG.md

@@ -8,9 +8,16 @@
 
 * Improved logic for resolving breakpoints in local functions and lambdas ([#1678](https://github.com/OmniSharp/omnisharp-vscode/issues/1678))
 
+
+#### Project System
+
+* Fixed bug where `LangVersion` property was not read correctly from project file, blocking C# 7.1 development. ([omnisharp-roslyn#961](https://github.com/OmniSharp/omnisharp-roslyn/issues/961), PR: [omnisharp-roslyn#962](https://github.com/OmniSharp/omnisharp-roslyn/pull/962)]) _(Contributed by [@filipw](https://github.com/filipw))_
+* Fixed issue where signing key was not read correctly from project file, which can result in InternalsVisibleTo not being handled properly. (PR: [omnisharp-roslyn#964](https://github.com/OmniSharp/omnisharp-roslyn/pull/964))
+
 #### Testing
 
 * Fix error that occurs when running or debugging tests with latest xUnit 2.3.0 builds. ([#1733](https://github.com/OmniSharp/omnisharp-vscode/issues/1733), [omnisharp-rolsyn#944](https://github.com/OmniSharp/omnisharp-roslyn/issues/944), PR: [omnisharp-roslyn#945](https://github.com/OmniSharp/omnisharp-roslyn/pull/945), [#1749](https://github.com/OmniSharp/omnisharp-vscode/pull/1749))
+* Fix issue causing NUnit tests not to work when running or debugging tests. ([#1615](https://github.com/OmniSharp/omnisharp-vscode/issues/1635), PR: [#1760](https://github.com/OmniSharp/omnisharp-vscode/pull/1760)). _(Contributed by [@dgileadi](https://github.com/dgileadi))_
 * Pass `--no-restore` when invoking `dotnet build` to ensure that implicit restore does not run, making the build and the test run a bit faster. ([omnisharp-roslyn##942](https://github.com/OmniSharp/omnisharp-roslyn/issues/942), PR: [omnisharp-roslyn#945](https://github.com/OmniSharp/omnisharp-roslyn/pull/945))
 
 ## 1.12.1 (August 14, 2017)