Version 1.3.1.0: update JCOBridge version

Version based on JCOBridge v2.3.1, compiled with jdk-13.0.2+8 with backward compatibility to Java SE 8.
Available for .NET Framework, .NET Core 3.1 and .NET 5.

The following features are available:

• Only public Types are available
• Classes and public accessible methods
• Inheritance: incomplete
• Interface
• Enum: enumeration and flags are available
• .NET exception are translated and thrown in code
• Static classes are managed
• Events
• Arrays: partial support
• Native types managed from JCOBridge are directly mapped to native Java type
  Base types (System.Object, System.Type, System.Enum, System.Exception, System.Collections.ArrayList, System.Collections.IEnumerable, System.Collections.IEnumerator) are mapped to specific types into the support library (JCOReflector.jar)
• Management of thrown declaration as expected in Java: a generic Throwable is used with all exceptions found in code (used the algorithm in https://stackoverflow.com/questions/986180/how-can-i-determine-which-exceptions-can-be-thrown-by-a-given-method and code from https://docs.microsoft.com/en-us/archive/blogs/haibo_luo/)
• Documentation

Known limitations at this release are:

• Out/Ref parameters: the developer shall write code using JCOBridge API
• Generic types
• Method decoration (Attributes)
• Unsafe methods
• Fields: the developer shall write code using JCOBridge API