Create 34.0.0

Needed to handle changes to ‘arguments’ and introduction of NameConstant
Ignore a vent for e.g. coverage runs
Test complex numbers
Fix a pragma statement
More thorough tests for elimination of dead try clauses
Eliminate some dead code
Introduce .coveragerc

Gets tests up to 100% coverage while scaling back on the amount of
pragma statements

Closes #21
Be very explicit about supporting complex numbers

Closes #22