Replace StringBuffer with StringBuilder, other minor String optimizations

Replace array copy loops with System.arraycopy

Only wrap the method name if the method doesn't come from the same declaring class

Fix renaming of classes in presence of generic signatures and nested classes.
This pull request has some problems but I'll fix them later.

fixes a bug of ClassFile#renameClass(), some imports could not be successfully renamed.

Lower requirement for an extra type in constructor to Java 7-

Using TCK Tested JDK builds of OpenJDK

Remove redundant type check

The same condition is repeated twice (caught by FindBugs.)

The AdoptOpenJDK has been discontinued since July 2021. When using Zulu you get all the latest updated (TCK Tested) builds for all versions of OpenJDK. 

Also added are fixed (major) release version(s) such as 11.0.3. This is often a good practice whenever a build/test triggers (push/pull events) this can determine if the latest JDK (11) had failed the build vs something in your code that caused it. For example, when building with JDK 11.0.3 (fixed version) the build passes (green) and JDK 11 fails (red) will mean that the latest JDK (11) was the cause and not your code. 



Note: Other distributions such as Temurin do not support archived fixed release prior to Sept. 2021.

Fix for NullPointerException on detach()

fix issue 305: CodeConverter.replaceArrayAccess leads to java.util.ConcurrentModificationException

Fix a race condition in CtClassType#getClassFile3

This fixes Issue #350.
Check for extended frame type when updating StackMapTable offset.

javassist fails to find a class when concurrently running process
compresses the class (converts classfile to raw bytes)

the idea of the fix is to make sure to only update rawClassfile and classfile
under lock in getClassFile3, all other places that modify classfile are
already synchronized

when reading the object state, we need to read under lock both classfile and
rawClassFile otherwise we might get an inconsistent state

add functions for getting the parameter names of method

Fixes #350

Fix typo in TypeChecker