Remove R# 2016.3 support

Build/Build.ps1

@@ -18,7 +18,6 @@ $SolutionFilePath = "ImplicitNullability.sln"
 $MSBuildPath = (Get-ChildItem "${env:ProgramFiles(x86)}\Microsoft Visual Studio\2017\*\MSBuild\15.0\Bin\MSBuild.exe").FullName
 $NUnitAdditionalArgs = "--x86 --labels=All --agents=1"
 $NUnitTestAssemblyPaths = @(
-    "Src\ImplicitNullability.Plugin.Tests\bin\R20163\$Configuration\ImplicitNullability.Plugin.Tests.R20163.dll"
     "Src\ImplicitNullability.Plugin.Tests\bin\R20171\$Configuration\ImplicitNullability.Plugin.Tests.R20171.dll"
     "Src\ImplicitNullability.Plugin.Tests\bin\R20172\$Configuration\ImplicitNullability.Plugin.Tests.R20172.dll"
     "Src\ImplicitNullability.Samples.Consumer\bin\OfInternalCodeWithIN\$Configuration\ImplicitNullability.Samples.Consumer.OfInternalCodeWithIN.dll"
@@ -27,7 +26,6 @@ $NUnitFrameworkVersion = "net-4.5"
 $TestCoverageFilter = "+[ImplicitNullability*]* -[ImplicitNullability*]ReSharperExtensionsShared.* -[ImplicitNullability.Samples.CodeWithIN.*]* -[ImplicitNullability.Samples.CodeWithoutIN.External]*"
 $NuspecPath = "Src\ImplicitNullability.Plugin\ImplicitNullability.nuspec"
 $NugetPackProperties = @(
-    "Version=$(CalcNuGetPackageVersion 20163);Configuration=$Configuration;DependencyVer=[7.0];BinDirInclude=bin\R20163"
     "Version=$(CalcNuGetPackageVersion 20171);Configuration=$Configuration;DependencyVer=[8.0];BinDirInclude=bin\R20171"
     "Version=$(CalcNuGetPackageVersion 20172);Configuration=$Configuration;DependencyVer=[9.0];BinDirInclude=bin\R20172"
 )

ImplicitNullability.sln

@@ -1,7 +1,7 @@
 
 Microsoft Visual Studio Solution File, Format Version 12.00
 # Visual Studio 15
-VisualStudioVersion = 15.0.26730.8
+VisualStudioVersion = 15.0.26730.10
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ImplicitNullability.Samples.CodeWithIN.Internal", "Src\ImplicitNullability.Samples.CodeWithIN\ImplicitNullability.Samples.CodeWithIN.Internal.csproj", "{4AF4FFEC-2FAC-426A-B8B2-06F4D9F52392}"
 	ProjectSection(ProjectDependencies) = postProject
@@ -30,10 +30,6 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "ImplicitNullability.Plugin.
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "ImplicitNullability.Plugin.Tests.R20172", "Src\ImplicitNullability.Plugin.Tests\ImplicitNullability.Plugin.Tests.R20172.csproj", "{B2619CD9-295A-4436-A83A-26E7AE540FB8}"
 EndProject
-Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "ImplicitNullability.Plugin.R20163", "Src\ImplicitNullability.Plugin\ImplicitNullability.Plugin.R20163.csproj", "{DB452FAF-D3A5-4CE9-AA1B-A738CB79F50D}"
-EndProject
-Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "ImplicitNullability.Plugin.Tests.R20163", "Src\ImplicitNullability.Plugin.Tests\ImplicitNullability.Plugin.Tests.R20163.csproj", "{1B815C86-2DD2-4B1F-A50A-3BFB7132D99E}"
-EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "ImplicitNullability.VsFormatDefinitions", "Src\ImplicitNullability.VsFormatDefinitions\ImplicitNullability.VsFormatDefinitions.csproj", "{06B8BCDD-6F91-42C7-A474-C50CD24C397E}"
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "ImplicitNullability.Plugin.R20171", "Src\ImplicitNullability.Plugin\ImplicitNullability.Plugin.R20171.csproj", "{2F246B16-414A-4FDF-9DE2-3EC8E51D1B9A}"
@@ -80,14 +76,6 @@ Global
 		{B2619CD9-295A-4436-A83A-26E7AE540FB8}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{B2619CD9-295A-4436-A83A-26E7AE540FB8}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{B2619CD9-295A-4436-A83A-26E7AE540FB8}.Release|Any CPU.Build.0 = Release|Any CPU
-		{DB452FAF-D3A5-4CE9-AA1B-A738CB79F50D}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{DB452FAF-D3A5-4CE9-AA1B-A738CB79F50D}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{DB452FAF-D3A5-4CE9-AA1B-A738CB79F50D}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{DB452FAF-D3A5-4CE9-AA1B-A738CB79F50D}.Release|Any CPU.Build.0 = Release|Any CPU
-		{1B815C86-2DD2-4B1F-A50A-3BFB7132D99E}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{1B815C86-2DD2-4B1F-A50A-3BFB7132D99E}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{1B815C86-2DD2-4B1F-A50A-3BFB7132D99E}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{1B815C86-2DD2-4B1F-A50A-3BFB7132D99E}.Release|Any CPU.Build.0 = Release|Any CPU
 		{06B8BCDD-6F91-42C7-A474-C50CD24C397E}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
 		{06B8BCDD-6F91-42C7-A474-C50CD24C397E}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{06B8BCDD-6F91-42C7-A474-C50CD24C397E}.Release|Any CPU.ActiveCfg = Release|Any CPU
@@ -116,11 +104,12 @@ Global
 		{9001EFB4-358F-4C98-AF13-F374E831A06E} = {67859B65-179D-40D0-80DB-003011824913}
 		{AB1C2F7C-E1AD-40B4-B2C2-8E5CA55B462F} = {67859B65-179D-40D0-80DB-003011824913}
 		{B2619CD9-295A-4436-A83A-26E7AE540FB8} = {67859B65-179D-40D0-80DB-003011824913}
-		{DB452FAF-D3A5-4CE9-AA1B-A738CB79F50D} = {67859B65-179D-40D0-80DB-003011824913}
-		{1B815C86-2DD2-4B1F-A50A-3BFB7132D99E} = {67859B65-179D-40D0-80DB-003011824913}
 		{06B8BCDD-6F91-42C7-A474-C50CD24C397E} = {67859B65-179D-40D0-80DB-003011824913}
 		{2F246B16-414A-4FDF-9DE2-3EC8E51D1B9A} = {67859B65-179D-40D0-80DB-003011824913}
 		{1C93B659-62A2-4539-815D-D20BABB47451} = {67859B65-179D-40D0-80DB-003011824913}
 		{4979B806-EB66-4C3F-8BB0-7AF284AEB0BD} = {67859B65-179D-40D0-80DB-003011824913}
 	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {4FF51D4C-B501-47FC-943D-395AEB7D3978}
+	EndGlobalSection
 EndGlobal

Src/ImplicitNullability.Plugin.Tests/Infrastructure/InspectionExpectationCommentsTestBase.cs

@@ -154,11 +154,7 @@ private static IReadOnlyCollection<IIssue> RunInspections(ISolution solution, IE
             var issues = new List<IIssue>();
 
             using (var lifetime = Lifetimes.Define(solution.GetLifetime()))
-#if RESHARPER20163
-            using (var nullProgressIndicator = NullProgressIndicator.Instance)
-#else
             using (var nullProgressIndicator = NullProgressIndicator.Create())
-#endif
             {
                 var collectInspectionResults = new CollectInspectionResults(solution, lifetime, nullProgressIndicator);
 

Src/ImplicitNullability.Plugin.Tests/UnitTests/Configuration/ImplicitNullabilityConfigurationEvaluatorTest.cs

@@ -10,7 +10,7 @@
 using JetBrains.ReSharper.TestFramework;
 using JetBrains.Util;
 using NUnit.Framework;
-#if RESHARPER20163 || RESHARPER20171
+#if RESHARPER20171
 using JetBrains.Application.Settings.Store.Implementation;
 #else
 using JetBrains.Application.Settings.Implementation;

Src/ImplicitNullability.Plugin/Configuration/OptionsPages/ImplicitNullabilityOptionsPage.cs

@@ -8,7 +8,7 @@
 using JetBrains.ReSharper.Feature.Services.Daemon.OptionPages;
 using JetBrains.UI.RichText;
 using JetBrains.Util;
-#if RESHARPER20163 || RESHARPER20171
+#if RESHARPER20171
 using JetBrains.UI;
 using JetBrains.UI.Options;
 using JetBrains.UI.Options.OptionsDialog2.SimpleOptions;

Src/ImplicitNullability.Plugin/ImplicitNullabilityProvider.cs

@@ -3,15 +3,12 @@
 using JetBrains.Annotations;
 using JetBrains.ReSharper.Psi;
 using JetBrains.ReSharper.Psi.CodeAnnotations;
+using JetBrains.ReSharper.Psi.CSharp;
 using JetBrains.ReSharper.Psi.CSharp.Util;
 using JetBrains.ReSharper.Psi.Util;
 using JetBrains.ReSharper.Psi.Xaml.DeclaredElements;
 using JetBrains.Util;
 using static JetBrains.ReSharper.Psi.DeclaredElementConstants;
-#if !RESHARPER20163
-using JetBrains.ReSharper.Psi.CSharp;
-
-#endif
 
 namespace ImplicitNullability.Plugin
 {
@@ -206,14 +203,10 @@ private bool IsExcludedGeneratedCode(ImplicitNullabilityConfiguration configurat
         [CanBeNull]
         private static IType GetTaskUnderlyingType(IType type)
         {
-#if RESHARPER20163
-            return type.GetTaskUnderlyingType();
-#else
             // Use "latest" language level because this just includes _more_ types (C# 7 "task-like" types) and the nullability
             // value we return here also effects _callers_ (whose C# language level we do not know).
 
             return type.GetTasklikeUnderlyingType(CSharpLanguageLevel.Latest);
-#endif
         }
 
         private static bool IsImplicitNullabilityApplicableToParameterOwner([CanBeNull] IParametersOwner parametersOwner)