Update dependencies

[cvara]

• Test against React 17
• Utilize latest testing-library API
• Update most critical dev dependencies (eslint, prettier etc)

[codecov]

Codecov Report

Merging #44 (e9e8988) into master (b8fd293) will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##            master       #44   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            7         7           
  Lines          135       131    -4     
  Branches        28        29    +1     
=========================================
- Hits           135       131    -4     

Impacted Files	Coverage Δ
src/plugins.ts	100.00% <100.00%> (ø)
src/useRxCollection.ts	100.00% <100.00%> (ø)
src/useRxDocument.ts	100.00% <100.00%> (ø)
src/useRxQuery.ts	100.00% <100.00%> (ø)
src/useRxData.ts	100.00% <0.00%> (ø)

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