v0.7.4

What's Changed

• Use pytest instead of py.test, and test more Python versions by @ali1234 in #100
• Fix the build badge by @Daft-Freak in #101
• Fix bug when deleting from flash and add unit tests by @ali1234 in #99
• Fix RLE decompress with bitstring >= 4.1.0 by @Daft-Freak in #103
• CI: Fix deprecation warnings, rename branch prep. by @Gadgetoid in #104

Full Changelog: v0.7.3...v0.7.4