- update homepage URL
- add `funding` info

Upon recommendation by @andrewbranch:
microsoft/TypeScript#36966 (comment)

- fixes `.subscribe(sub, xform)` where child `sub` was an actual instance
  of `Subscription` and the given `xform` transducer was silently
  ignored in that case...
- add test

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 - @thi.ng/api@6.10.3
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 - @thi.ng/geom-clip-line@1.0.13
 - @thi.ng/geom-clip-poly@1.0.13
 - @thi.ng/geom-closest-point@0.3.26
 - @thi.ng/geom-hull@0.0.46
 - @thi.ng/geom-io-obj@0.1.4
 - @thi.ng/geom-isec@0.4.15
 - @thi.ng/geom-isoline@0.1.44
 - @thi.ng/geom-poly-utils@0.1.44
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 - @thi.ng/geom-voronoi@0.1.44
 - @thi.ng/geom@1.9.1
 - @thi.ng/gp@0.1.14
 - @thi.ng/grid-iterators@0.3.11
 - @thi.ng/hdom-canvas@2.4.19
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 - @thi.ng/hdom-mock@1.1.22
 - @thi.ng/hdom@8.0.22
 - @thi.ng/heaps@1.2.12
 - @thi.ng/hiccup-carbon-icons@1.0.35
 - @thi.ng/hiccup-css@1.1.21
 - @thi.ng/hiccup-markdown@1.2.9
 - @thi.ng/hiccup-svg@3.4.16
 - @thi.ng/hiccup@3.2.20
 - @thi.ng/idgen@0.2.11
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 - @thi.ng/interceptors@2.2.16
 - @thi.ng/intervals@2.0.12
 - @thi.ng/iterators@5.1.21
 - @thi.ng/layout@0.1.9
 - @thi.ng/leb128@1.0.15
 - @thi.ng/lsys@0.2.41
 - @thi.ng/malloc@4.1.13
 - @thi.ng/math@1.7.8
 - @thi.ng/matrices@0.6.13
 - @thi.ng/memoize@2.0.9
 - @thi.ng/mime@0.1.9
 - @thi.ng/morton@2.0.11
 - @thi.ng/parse@0.5.2
 - @thi.ng/paths@4.0.4
 - @thi.ng/pixel@0.1.18
 - @thi.ng/pointfree-lang@1.4.1
 - @thi.ng/pointfree@2.0.2
 - @thi.ng/poisson@1.0.15
 - @thi.ng/porter-duff@0.1.17
 - @thi.ng/quad-edge@0.2.14
 - @thi.ng/ramp@0.1.15
 - @thi.ng/random@1.4.7
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 - @thi.ng/scenegraph@0.1.16
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 - @thi.ng/sexpr@0.2.14
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 - @thi.ng/shader-ast-stdlib@0.3.17
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 - @thi.ng/simd@0.1.15
 - @thi.ng/soa@0.1.17
 - @thi.ng/sparse@0.1.37
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 - @thi.ng/system@0.2.6
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 - @thi.ng/transducers-fsm@1.1.21
 - @thi.ng/transducers-hdom@2.0.48
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 - @thi.ng/transducers@6.4.8
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 - @thi.ng/vector-pools@1.0.26
 - @thi.ng/vectors@4.3.3
 - @thi.ng/webgl-msdf@0.1.29
 - @thi.ng/webgl-shadertoy@0.2.16
 - @thi.ng/webgl@1.0.11
 - @thi.ng/zipper@0.1.13