nvim: add deprecatedSince(7) to ClearBufferHighlight, add AllOptionsInfo and OptionInfo

[zchee]

• add deprecatedSince(7) to ClearBufferHighlight
• add AllOptionsInfo and OptionInfo methods

[codecov]

Codecov Report

Merging #85 (8b755b9) into master (bbdb4b1) will increase coverage by 0.3%.
The diff coverage is 87.5%.

@@           Coverage Diff            @@
##           master     #85     +/-   ##
========================================
+ Coverage    57.6%   58.0%   +0.3%     
========================================
  Files          11      11             
  Lines        2132    2140      +8     
========================================
+ Hits         1230    1243     +13     
+ Misses        768     763      -5     
  Partials      134     134             

Flag	Coverage Δ
linux-1.13	58.0% <87.5%> (+0.3%)	⬆️
linux-1.14	58.0% <87.5%> (+0.3%)	⬆️
linux-1.15	58.0% <87.5%> (+0.3%)	⬆️
macos-1.13	58.0% <87.5%> (+0.3%)	⬆️
macos-1.14	58.0% <87.5%> (+0.3%)	⬆️
macos-1.15	58.0% <87.5%> (+0.3%)	⬆️

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Impacted Files	Coverage Δ
nvim/apiimp.go	26.9% <87.5%> (+1.1%)	⬆️
msgpack/decode.go	64.3% <0.0%> (+0.5%)	⬆️
msgpack/unpack.go	86.0% <0.0%> (+3.1%)	⬆️

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