update devDependencies: web-audio-mock -> web-audio-test-api@0.1.11
add test utility: global.closeTo(actual, expected, delta)
update tests
remove stub from NeuContext test
remove stub from NeuSynth test
fix NeuSynth: flatten inputs
fix NeuUGen::makeOutlet: variable name typo
fix _.connect(spec): _connect(to) method support
add $offset property to NeuUGen/NeuParam/NeuIn
add NeuUGen#_connect(to) [wip]
add NeuUnit#$offset
update NeuUGen::makeOutlet: offset support
fix NeuUGen: offset support
fix NeuSynth: offset support
fix ugen/add: offset support
fix ugen/mul: offset support
update test bootstrap
add NeuParam test: _connect(to)
refactor NeuParam
add NeuSynth::makeOutlet(context, ugen)