0.9.13

Description

• Better handling of empty strings passed as input.
• Fix the shift safe number issue from 0.9.12
• More minor pylint / etc fixes / cleanups (general code quality)
• separate .parse from #115
• Allow setting up completely empty {} operators / functions ( #75 via #123 )
• Add extra bit-ops from #87
• Add @daxamin to contributors ?
• Version bump stuff.
• other readme tweaks
• star expressions, eg x = {"a": 1, "b": 2, **c}

0.9.12

KInd of hoping this is the last 0.9 release, and I find time to stablize as 1.0, and start the 2.0 work some time soon...

Changelog:

• Remove Cyclic references (memory leak)
• Add left & right shift operations (<< and >>)
• Switch to GH actions & CodeCov.io for CI tests
• Add extra contributors details
• Reformat w/ Black + isort, and have linting of those in CI