Version 0.8.0

Now detecting even more language features.

• Detecting self-documenting f-strings (3.8)
• Detecting continue in try-finally block (3.8)
• Detecting modular inverse pow(.., -y, ..) (3.8)
• Detecting asynchronous comprehensions (3.6)
• Detecting asynchronous generators (3.6 -> 3.7)
• Detecting await in comprehensions (3.6 -> 3.7)
• Detecting infix matrix multiplication @ (3.5)
• Detecting dict comprehensions (#22, 2.7, 3.0)
• Detecting exception context cause (3.3)
• Detecting yield from expressions (#21, 3.3)
• Detecting builtin bytes class from type usage
• Added 17 rules
• Introduced verbosity level 4 which currently displays user-defined symbols being ignored
• Removed unused code
• Improved test coverage
• General code improvements

Thanks to @ozturkberkay for reporting issues regarding dict comprehensions and yield from expressions.