Set C# 7 as LangVersion for GodotTools and Godot API projects

This will make it harder for someone to accidentally commit code that requires a newer version.

modules/mono/editor/GodotTools/GodotTools.BuildLogger/GodotTools.BuildLogger.csproj

@@ -11,6 +11,7 @@
     <AssemblyName>GodotTools.BuildLogger</AssemblyName>
     <TargetFrameworkVersion>v4.5</TargetFrameworkVersion>
     <FileAlignment>512</FileAlignment>
+    <LangVersion>7</LangVersion>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
     <PlatformTarget>AnyCPU</PlatformTarget>

modules/mono/editor/GodotTools/GodotTools.Core/GodotTools.Core.csproj

@@ -8,6 +8,7 @@
     <RootNamespace>GodotTools.Core</RootNamespace>
     <AssemblyName>GodotTools.Core</AssemblyName>
     <TargetFrameworkVersion>v4.5</TargetFrameworkVersion>
+    <LangVersion>7</LangVersion>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
     <DebugSymbols>true</DebugSymbols>

modules/mono/editor/GodotTools/GodotTools.IdeConnection/GodotTools.IdeConnection.csproj

@@ -11,6 +11,7 @@
     <AssemblyName>GodotTools.IdeConnection</AssemblyName>
     <TargetFrameworkVersion>v4.5</TargetFrameworkVersion>
     <FileAlignment>512</FileAlignment>
+    <LangVersion>7</LangVersion>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
     <PlatformTarget>AnyCPU</PlatformTarget>

modules/mono/editor/GodotTools/GodotTools.ProjectEditor/GodotTools.ProjectEditor.csproj

@@ -9,6 +9,7 @@
     <AssemblyName>GodotTools.ProjectEditor</AssemblyName>
     <TargetFrameworkVersion>v4.5</TargetFrameworkVersion>
     <BaseIntermediateOutputPath>obj</BaseIntermediateOutputPath>
+    <LangVersion>7</LangVersion>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
     <DebugSymbols>true</DebugSymbols>

modules/mono/editor/GodotTools/GodotTools/GodotTools.csproj

@@ -10,6 +10,7 @@
     <TargetFrameworkVersion>v4.5</TargetFrameworkVersion>
     <GodotSourceRootPath>$(SolutionDir)/../../../../</GodotSourceRootPath>
     <GodotApiConfiguration>Debug</GodotApiConfiguration>
+    <LangVersion>7</LangVersion>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
     <DebugSymbols>true</DebugSymbols>

modules/mono/glue/Managed/Managed.csproj

@@ -8,6 +8,7 @@
     <RootNamespace>Managed</RootNamespace>
     <AssemblyName>Managed</AssemblyName>
     <TargetFrameworkVersion>v4.5</TargetFrameworkVersion>
+    <LangVersion>7</LangVersion>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|x86' ">
     <DebugSymbols>true</DebugSymbols>