Add testIntercept().
Add getter for calls to Manifest.
Fix Manifest::registerCall().
Add Manifest::clearCalls().
Add ManifestTest::testRegisterCall().
Add ManifestTest::testClearRegisteredCalls().
Remove composer.lock from .gitignore
Fix bug in Manifest::intercept().
Update testIntercept().
Add testCallUnexpectedMethod() and testCallAndReturnScalarResult().
Add testCallWithClosure() and testCallWithScopeClosure().
Merge branch 'feature/test-manifest' into develop