- TSPHP-740 Improve code coverage parser
-- added new tests
-- improved existing one
- TSPHP-652 Exception when type for extends/implements is missing
-- Had to change the way classInterfaceTypeWithoutObject rule constructed the AST (it ignored when no namespaceId was provided)
-- Added corresponding tests which cover this scenario
- introduced a class constant BACKSLASH for the parser (instead of using a local variable in several rules)