v2.0.0

• Complete rewrite of the variable resolver. We use the amazing cfn-resolver-lib lib now. This allows us to support not only Ref and Fn::ImportValue as in previous releases, but we're able to resolve the most commonly used intrinsic functions automatically now.
• Customize the resolution of Ref, Fn::GetAtt and Fn::ImportValue using configuration options.
• Added --all command line parameter to merge the environment variables of all functions into a single .env file. Please note that the behavior is undefined if functions use conflicting values for the same environment variable name.