feat: 1.2.0

[zlataovce]

Changes:

• Intern (pool) strings while resolving in generator-web-cli and generator-accessor-plugin.
• Allow choosing namespaces to resolve in ResolveMappingsTask (generator-accessor-plugin).
• Implement #31.
• Add Quilt mappings (#33).
• Validate hashes of resolved maven-metadata.xml files to catch changes (#35).
• Add @since and @version tags to generated accessors (#38).
• Add naming strategies (#39).