[gh-1343] Add latest mirrorsharp project to the solution

Author: ashmind

source/SharpLab.sln

@@ -110,6 +110,8 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Internal.Roslyn410", "#exte
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Internal.Roslyn411", "#external\mirrorsharp-codemirror-6-preview\Internal.Roslyn411\Internal.Roslyn411.csproj", "{A91AD05D-9BD5-43C3-9A0B-7D0F8CCE0267}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Internal.Roslyn412", "#external\mirrorsharp-codemirror-6-preview\Internal.Roslyn412\Internal.Roslyn412.csproj", "{4CAF1FEC-CAC2-44BE-A72B-540877583C36}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -929,6 +931,24 @@ Global
 		{A91AD05D-9BD5-43C3-9A0B-7D0F8CCE0267}.Release|x64.Build.0 = Release|Any CPU
 		{A91AD05D-9BD5-43C3-9A0B-7D0F8CCE0267}.Release|x86.ActiveCfg = Release|Any CPU
 		{A91AD05D-9BD5-43C3-9A0B-7D0F8CCE0267}.Release|x86.Build.0 = Release|Any CPU
+		{4CAF1FEC-CAC2-44BE-A72B-540877583C36}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{4CAF1FEC-CAC2-44BE-A72B-540877583C36}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{4CAF1FEC-CAC2-44BE-A72B-540877583C36}.Debug|x64.ActiveCfg = Debug|Any CPU
+		{4CAF1FEC-CAC2-44BE-A72B-540877583C36}.Debug|x64.Build.0 = Debug|Any CPU
+		{4CAF1FEC-CAC2-44BE-A72B-540877583C36}.Debug|x86.ActiveCfg = Debug|Any CPU
+		{4CAF1FEC-CAC2-44BE-A72B-540877583C36}.Debug|x86.Build.0 = Debug|Any CPU
+		{4CAF1FEC-CAC2-44BE-A72B-540877583C36}.Debug-Vsix|Any CPU.ActiveCfg = Debug|Any CPU
+		{4CAF1FEC-CAC2-44BE-A72B-540877583C36}.Debug-Vsix|Any CPU.Build.0 = Debug|Any CPU
+		{4CAF1FEC-CAC2-44BE-A72B-540877583C36}.Debug-Vsix|x64.ActiveCfg = Debug|Any CPU
+		{4CAF1FEC-CAC2-44BE-A72B-540877583C36}.Debug-Vsix|x64.Build.0 = Debug|Any CPU
+		{4CAF1FEC-CAC2-44BE-A72B-540877583C36}.Debug-Vsix|x86.ActiveCfg = Debug|Any CPU
+		{4CAF1FEC-CAC2-44BE-A72B-540877583C36}.Debug-Vsix|x86.Build.0 = Debug|Any CPU
+		{4CAF1FEC-CAC2-44BE-A72B-540877583C36}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{4CAF1FEC-CAC2-44BE-A72B-540877583C36}.Release|Any CPU.Build.0 = Release|Any CPU
+		{4CAF1FEC-CAC2-44BE-A72B-540877583C36}.Release|x64.ActiveCfg = Release|Any CPU
+		{4CAF1FEC-CAC2-44BE-A72B-540877583C36}.Release|x64.Build.0 = Release|Any CPU
+		{4CAF1FEC-CAC2-44BE-A72B-540877583C36}.Release|x86.ActiveCfg = Release|Any CPU
+		{4CAF1FEC-CAC2-44BE-A72B-540877583C36}.Release|x86.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
@@ -975,6 +995,7 @@ Global
 		{70C3477B-8A46-480A-AB1D-0DCD486A55AD} = {857B6AAC-168B-4C0A-AC0E-9471B1133E18}
 		{23253C8E-341C-4613-9834-E7CDBE2D88BA} = {857B6AAC-168B-4C0A-AC0E-9471B1133E18}
 		{A91AD05D-9BD5-43C3-9A0B-7D0F8CCE0267} = {857B6AAC-168B-4C0A-AC0E-9471B1133E18}
+		{4CAF1FEC-CAC2-44BE-A72B-540877583C36} = {857B6AAC-168B-4C0A-AC0E-9471B1133E18}
 	EndGlobalSection
 	GlobalSection(ExtensibilityGlobals) = postSolution
 		SolutionGuid = {8CE0498A-BD84-493A-92FE-9B9AB146D86D}