Merge pull request github#3384 from hvitved/csharp/docs/dotnet-core-3.1

C#: Update `version-compilers.rst` to mention .NET Core 3.1

Author: hvitved

docs/language/support/reusables/versions-compilers.rst

@@ -11,23 +11,22 @@
    Microsoft extensions (up to VS 2019),
 
    Arm Compiler 5 [2]_","``.cpp``, ``.c++``, ``.cxx``, ``.hpp``, ``.hh``, ``.h++``, ``.hxx``, ``.c``, ``.cc``, ``.h``"
-   C#,C# up to 8.0. with .NET up to 4.8 [3]_,"Microsoft Visual Studio up to 2019, 
+   C#,C# up to 8.0,"Microsoft Visual Studio up to 2019 with .NET up to 4.8,
 
-   .NET Core up to 3.0","``.sln``, ``.csproj``, ``.cs``, ``.cshtml``, ``.xaml``"
+   .NET Core up to 3.1","``.sln``, ``.csproj``, ``.cs``, ``.cshtml``, ``.xaml``"
    Go (aka Golang), "Go up to 1.14", "Go 1.11 or more recent", ``.go``
-   Java,"Java 6 to 14 [4]_","javac (OpenJDK and Oracle JDK),
+   Java,"Java 6 to 14 [3]_","javac (OpenJDK and Oracle JDK),
 
-   Eclipse compiler for Java (ECJ) [5]_",``.java``
-   JavaScript,ECMAScript 2019 or lower,Not applicable,"``.js``, ``.jsx``, ``.mjs``, ``.es``, ``.es6``, ``.htm``, ``.html``, ``.xhm``, ``.xhtml``, ``.vue``, ``.json``, ``.yaml``, ``.yml``, ``.raml``, ``.xml`` [6]_"
+   Eclipse compiler for Java (ECJ) [4]_",``.java``
+   JavaScript,ECMAScript 2019 or lower,Not applicable,"``.js``, ``.jsx``, ``.mjs``, ``.es``, ``.es6``, ``.htm``, ``.html``, ``.xhm``, ``.xhtml``, ``.vue``, ``.json``, ``.yaml``, ``.yml``, ``.raml``, ``.xml`` [5]_"
    Python,"2.7, 3.5, 3.6, 3.7, 3.8",Not applicable,``.py``
-   TypeScript [7]_,"2.6-3.7",Standard TypeScript compiler,"``.ts``, ``.tsx``"
+   TypeScript [6]_,"2.6-3.7",Standard TypeScript compiler,"``.ts``, ``.tsx``"
 
 .. container:: footnote-group
 
     .. [1] Support for the clang-cl compiler is preliminary.
     .. [2] Support for the Arm Compiler (armcc) is preliminary.
-    .. [3] In addition, support is included for the preview features of C# 8.0 and .NET Core 3.0.
-    .. [4] Builds that execute on Java 6 to 14 can be analyzed. The analysis understands Java 14 standard language features.
-    .. [5] ECJ is supported when the build invokes it via the Maven Compiler plugin or the Takari Lifecycle plugin.
-    .. [6] JSX and Flow code, YAML, JSON, HTML, and XML files may also be analyzed with JavaScript files. 
-    .. [7] TypeScript analysis is performed by running the JavaScript extractor with TypeScript enabled. This is the default for LGTM.   
+    .. [3] Builds that execute on Java 6 to 14 can be analyzed. The analysis understands Java 14 standard language features.
+    .. [4] ECJ is supported when the build invokes it via the Maven Compiler plugin or the Takari Lifecycle plugin.
+    .. [5] JSX and Flow code, YAML, JSON, HTML, and XML files may also be analyzed with JavaScript files. 
+    .. [6] TypeScript analysis is performed by running the JavaScript extractor with TypeScript enabled. This is the default for LGTM.