- add pass flag and only succeed if main parser passed at least once

- add `.` catch-all term
- add `(?=...)` suffix form for lookahead
- update TERM/TERM_BODY

- update lookahead (cap, non-cap versions)
- add lookahead for alt terms
- update `compileLookahead()`
- add line comment support
- fix `{n}` repeat modifier handling
- add `trim()`/`xfTrim()` xforms

- add opt support for custom print fns (other than console)

- many thanks to @nkint for reporting! :)

- new fn improves tree shaking and can avoid inclusion of @thi.ng/mime
  if mime type is explicitly provided by user

- update readme

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 - @thi.ng/associative@4.4.0
 - @thi.ng/atom@4.1.14
 - @thi.ng/bencode@0.3.31
 - @thi.ng/bitfield@0.3.15
 - @thi.ng/cache@1.0.51
 - @thi.ng/color@1.2.7
 - @thi.ng/csp@1.1.31
 - @thi.ng/dcons@2.2.24
 - @thi.ng/dgraph-dot@0.1.16
 - @thi.ng/dgraph@1.2.16
 - @thi.ng/dl-asset@0.4.0
 - @thi.ng/dsp-io-wav@0.1.21
 - @thi.ng/dsp@2.0.23
 - @thi.ng/ecs@0.3.23
 - @thi.ng/fsm@2.4.17
 - @thi.ng/geom-accel@2.1.13
 - @thi.ng/geom-api@1.0.25
 - @thi.ng/geom-arc@0.3.3
 - @thi.ng/geom-clip-line@1.1.3
 - @thi.ng/geom-clip-poly@1.0.23
 - @thi.ng/geom-closest-point@0.3.36
 - @thi.ng/geom-fuzz@0.1.6
 - @thi.ng/geom-hull@0.0.56
 - @thi.ng/geom-io-obj@0.1.14
 - @thi.ng/geom-isec@0.4.25
 - @thi.ng/geom-isoline@0.1.54
 - @thi.ng/geom-poly-utils@0.1.54
 - @thi.ng/geom-resample@0.2.36
 - @thi.ng/geom-splines@0.5.23
 - @thi.ng/geom-subdiv-curve@0.1.53
 - @thi.ng/geom-tessellate@0.2.36
 - @thi.ng/geom-voronoi@0.1.54
 - @thi.ng/geom@1.10.6
 - @thi.ng/gp@0.1.24
 - @thi.ng/grid-iterators@0.4.3
 - @thi.ng/hdiff@0.1.7
 - @thi.ng/hdom-canvas@3.0.8
 - @thi.ng/hdom-components@4.0.5
 - @thi.ng/hdom-mock@1.1.35
 - @thi.ng/hdom@8.2.3
 - @thi.ng/hiccup-canvas@1.0.5
 - @thi.ng/hiccup-carbon-icons@1.0.47
 - @thi.ng/hiccup-css@1.1.31
 - @thi.ng/hiccup-markdown@1.2.23
 - @thi.ng/hiccup-svg@3.5.3
 - @thi.ng/hiccup@3.5.3
 - @thi.ng/iges@1.1.38
 - @thi.ng/imgui@0.2.28
 - @thi.ng/interceptors@2.2.25
 - @thi.ng/iterators@5.1.31
 - @thi.ng/leb128@1.0.25
 - @thi.ng/lsys@0.2.51
 - @thi.ng/matrices@0.6.23
 - @thi.ng/oquery@0.1.1
 - @thi.ng/parse@0.7.0
 - @thi.ng/paths@4.1.0
 - @thi.ng/poisson@1.1.7
 - @thi.ng/ramp@0.1.25
 - @thi.ng/range-coder@1.0.51
 - @thi.ng/rdom-canvas@0.1.3
 - @thi.ng/rdom-components@0.1.0
 - @thi.ng/rdom@0.2.0
 - @thi.ng/resolve-map@4.1.30
 - @thi.ng/rstream-csp@2.0.29
 - @thi.ng/rstream-dot@1.1.36
 - @thi.ng/rstream-gestures@2.0.28
 - @thi.ng/rstream-graph@3.2.29
 - @thi.ng/rstream-log-file@0.1.51
 - @thi.ng/rstream-log@3.1.36
 - @thi.ng/rstream-query@1.1.36
 - @thi.ng/rstream@4.6.0
 - @thi.ng/sax@1.1.31
 - @thi.ng/scenegraph@0.1.26
 - @thi.ng/shader-ast-glsl@0.1.34
 - @thi.ng/shader-ast-js@0.4.30
 - @thi.ng/shader-ast-stdlib@0.3.27
 - @thi.ng/shader-ast@0.3.28
 - @thi.ng/simd@0.2.8
 - @thi.ng/soa@0.1.27
 - @thi.ng/sparse@0.1.47
 - @thi.ng/strings@1.9.0
 - @thi.ng/system@0.2.16
 - @thi.ng/text-canvas@0.2.20
 - @thi.ng/transducers-binary@0.5.21
 - @thi.ng/transducers-fsm@1.1.31
 - @thi.ng/transducers-hdom@2.0.63
 - @thi.ng/transducers-patch@0.1.22
 - @thi.ng/transducers-stats@1.1.31
 - @thi.ng/transducers@7.1.4
 - @thi.ng/vector-pools@1.0.36
 - @thi.ng/vectors@4.5.3
 - @thi.ng/webgl-msdf@0.1.41
 - @thi.ng/webgl-shadertoy@0.2.28
 - @thi.ng/webgl@2.0.5