Add no-op variant of the API for unsupported browsers

[codecov-io]

Codecov Report

Merging #19 into master will decrease coverage by 9.36%. The diff coverage is n/a.

@@            Coverage Diff             @@
##           master      #19      +/-   ##
==========================================
- Coverage   86.73%   77.37%   -9.37%     
==========================================
  Files          32       34       +2     
  Lines        1251     1255       +4     
  Branches      155      136      -19     
==========================================
- Hits         1085      971     -114     
- Misses        166      242      +76     
- Partials        0       42      +42

Impacted Files	Coverage Δ
ts/protocol/errors.ts	70.96% <ø> (-2.51%)	:arrow_down:
ts/api/api.ts	23.02% <ø> (-53.9%)	:arrow_down:
ts/api/provider_frame_elem.ts	23.07% <0%> (-41.93%)	:arrow_down:
ts/test_utils/timeout.ts	76.92% <0%> (-23.08%)	:arrow_down:
ts/spi/spi.ts	91.66% <0%> (-8.34%)	:arrow_down:
ts/protocol/utils.ts	71.59% <0%> (-7.96%)	:arrow_down:
ts/api/hint_available_request.ts	93.75% <0%> (-6.25%)	:arrow_down:
ts/test_utils/listeners.ts	88.23% <0%> (-6.21%)	:arrow_down:
ts/spi/provider_frame.ts	78.1% <0%> (-5.53%)	:arrow_down:
... and 26 more

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[iainmcgin]

PTAL

[iainmcgin]

Testing it in-situ is difficult as it performs the replacement as a one-time operation on load of the module. I can refactor to at least pull out and test the logic that makes the decision.

[TMSCH]

Closing in favor of #61