v0.4.2 release on PyPi

What's Changed

• Fix import sequence by @Mec-iS in #210
• update abort_on_error to abort_on_first for pyshacl by @fils in #213
• upgrade OWL-RL and pySHACL to track RDFlib updates #214 by @ceteri in #215
• migrate up to Py 3.7 or later by @ceteri in #216
• migrate up to Py 3.7 or later by @ceteri in #217

New Contributors

• @fils made their first contribution in #213

Full Changelog: v0.4.1...v0.4.2