Update copyright information for 2021

ICSharpCode.Decompiler.Console/ICSharpCode.Decompiler.Console.csproj

@@ -10,7 +10,7 @@
     <ToolCommandName>ilspycmd</ToolCommandName>
     <Version>7.0.0.6225-preview1</Version>
     <Description>Command-line decompiler using the ILSpy decompilation engine</Description>
-    <Copyright>Copyright 2011-2020 AlphaSierraPapa</Copyright>
+    <Copyright>Copyright 2011-2021 AlphaSierraPapa</Copyright>
     <PackageProjectUrl>https://github.com/icsharpcode/ILSpy/</PackageProjectUrl>
     <PackageLicenseExpression>MIT</PackageLicenseExpression>
     <PackageIcon>ILSpyCmdNuGetPackageIcon.png</PackageIcon>

ICSharpCode.Decompiler/ICSharpCode.Decompiler.csproj

@@ -7,7 +7,7 @@
     <Description>IL decompiler engine</Description>
     <Company>ic#code</Company>
     <Product>ILSpy</Product>
-    <Copyright>Copyright 2011-2020 AlphaSierraPapa for the SharpDevelop Team</Copyright>
+    <Copyright>Copyright 2011-2021 AlphaSierraPapa for the SharpDevelop Team</Copyright>
     <NeutralLanguage>en-US</NeutralLanguage>
     <GenerateAssemblyVersionAttribute>False</GenerateAssemblyVersionAttribute>
     <GenerateAssemblyFileVersionAttribute>False</GenerateAssemblyFileVersionAttribute>

doc/ILSpyAboutPage.txt

@@ -3,7 +3,7 @@ ILSpy is the open-source .NET assembly browser and decompiler.
 Website: https://ilspy.net/
 Found a bug? https://github.com/icsharpcode/ILSpy/issues/new/choose
 
-Copyright 2011-2020 AlphaSierraPapa for the ILSpy team
+Copyright 2011-2021 AlphaSierraPapa for the ILSpy team
 Current and past contributors: https://github.com/icsharpcode/ILSpy/graphs/contributors
 
 ILSpy is distributed under the MIT License.

doc/ILSpyAboutPage_zh_Hans.txt

@@ -4,7 +4,7 @@ ILSpy 是开源的 .NET 程序集浏览器和反编译器。
 反馈BUG: https://github.com/icsharpcode/ILSpy/issues/new/choose
 中文翻译反馈：https://github.com/maikebing/ILSpy/issues
 
-Copyright 2011-2020 AlphaSierraPapa for the ILSpy team
+Copyright 2011-2021 AlphaSierraPapa for the ILSpy team
 当前和过去的贡献者: https://github.com/icsharpcode/ILSpy/graphs/contributors
 
 ILSpy 基于 MIT 许可证发行。

doc/copyright.txt

@@ -1,4 +1,4 @@
-Copyright 2011-2020 for the ILSpy team
+Copyright 2011-2021 for the ILSpy team
 by
 
   AlphaSierraPapa, Christoph Wille

doc/license.txt

@@ -1,6 +1,6 @@
 MIT license
 
-Copyright (c) 2011-2020 AlphaSierraPapa for the ILSpy team
+Copyright (c) 2011-2021 AlphaSierraPapa for the ILSpy team
 
 Permission is hereby granted, free of charge, to any person obtaining a copy of this
 software and associated documentation files (the "Software"), to deal in the Software