Remove unnecessary type assertions

Attach Getter type to ProxyLens and ProxyTraversal types

Add map and tap

Get rid of array mutation helper function, fix array type inference

Move two-way mod to iso

Omit lens as getter from signatures, extend lens type with callable

Callable lenses as getters

Reverted mod arguments to getter and setter, more tests

Remove bad dependency ts-node

Unified peg and mod interfaces, emitting sourcemap