Megaparsec’s test suite as a standalone package. The reason for the
separation is that we can avoid circular dependency on hspec-megaparsec
and thus avoid keeping copies of its source files in our test suite, as we
had to do before. Another benefit is that we can export some auxiliary
functions in megaparsec-tests which can be used by other test suites, for
example in the parser-combinators-tests package.
The version number of megaparsec-tests will be kept in sync with versions
of megaparsec from now on.
