Document the release of CppSharp 0.9.1

Signed-off-by: Dimitar Dobrev <dpldobrev@protonmail.com>

Author: ddobrev

docs/releases/CppSharp-0.9.1-13.4.2019.md

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+# CppSharp 0.9.1 13.4.2019
+
+* Generate valid C# for template indexers taking const char*
+
+* Restore removed specializations
+
+* Add a generic pointer to resolve ambiguity
+
+* Fix a crash when a function pointer is a template arg
+
+* Expose public anonymous types
+
+* Fix the generated C# for fields of type function pointer
+
+* Fix the generated C# for const char*&
+
+* Fix the pass for duplicate names not to compare return parameters
+
+* Fix the generated C# when type arguments are mapped the same
+
+* Fix typo in options: chsarp -> csharp
+
+* Fix #1191 CppSharp.CLI.exe --rtti sets -fno-rtti to clang
+
+* Fix the generated C# for a case with 2 template args
+
+* Fix the generation of properties for locations in expressions
+
+* Added statement visiting to IAstVisitor
+
+* Fix the generated C# when a dependent param has a default value
+
+* Fix ambiguous code when a nested type and a property-like method with overloads have the same name