eval_ex 1.0.1

A mathematical and boolean expression evaluator, ported from https://github.com/uklimaschewski/EvalEx.

[1.0.1] - 9/15/2020

Added examples and fixed formatting.

[1.0.0] - 9/15/2020

Initial port of https://github.com/uklimaschewski/EvalEx.
Differences in implementation currently:

• Hyperbolic functions aren't supported
• The SQRT function is currently limited to 64-bit precision
• Built in operators/functions/variables are instead defined in built_ins.dart
• Precision is handled slightly differently (no math context)