CI and version string bump for `v0.5.1` (#149)

* include testing on newer python versions

* bump version string

* linting: remove print statements from tests

* fix: improve robustness of  and add a test #141

* fix: add init to test data module

* fix: add init to remaining test data modules

* tests: add tests with github actions

* tests: add tests with github actions

* tests: rename build job

* update changelog

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Co-authored-by: Arian Jamasb <[email protected]>

bump version string

add content type

Merge pull request #135 from AH-Merii/create-release-0.5.0dev

Add automated tests and release v0.5.0-dev

Merge pull request #138 from BioPandas/publish-on-release

add autopublish

release tag

release tag

Merge pull request #126 from BioPandas/mmtf-gzip

Mmtf gzip

Merge pull request #104 from a-r-j/patch-0.4.1

update for 3.7 compat