chore: update typescript to 4.3 and enable noImplicitOverride

[Flarna]

Enable typescript 4.3 feature noImplicitOverride to improve code quality and adapt code as needed.
Besides that I updated eslint.

[codecov]

Codecov Report

Merging #2241 (4522900) into main (56c032e) will decrease coverage by 0.01%.
The diff coverage is 96.29%.

❗ Current head 4522900 differs from pull request most recent head 0447995. Consider uploading reports for the commit 0447995 to get more accurate results

@@            Coverage Diff             @@
##             main    #2241      +/-   ##
==========================================
- Coverage   92.31%   92.29%   -0.02%     
==========================================
  Files         144      144              
  Lines        5168     5168              
  Branches     1064     1064              
==========================================
- Hits         4771     4770       -1     
- Misses        397      398       +1     

Impacted Files	Coverage Δ
...ackages/opentelemetry-shim-opentracing/src/shim.ts	89.60% <92.30%> (ø)
...ages/opentelemetry-exporter-collector/src/types.ts	100.00% <100.00%> (ø)
...s/opentelemetry-instrumentation-fetch/src/fetch.ts	96.98% <100.00%> (ø)
...elemetry-instrumentation-grpc/src/grpc-js/index.ts	90.81% <100.00%> (ø)
...entelemetry-instrumentation-grpc/src/grpc/index.ts	93.04% <100.00%> (ø)
...ges/opentelemetry-instrumentation-http/src/http.ts	95.68% <100.00%> (ø)
...emetry-instrumentation-xml-http-request/src/xhr.ts	96.58% <100.00%> (ø)
...es/opentelemetry-metrics/src/BaseObserverMetric.ts	100.00% <100.00%> (ø)
...ges/opentelemetry-metrics/src/SumObserverMetric.ts	100.00% <100.00%> (ø)
...kages/opentelemetry-node/src/NodeTracerProvider.ts	100.00% <100.00%> (ø)
... and 2 more

[obecny]

lgtm

[obecny]

@Flarna are you planning to do the same on api and contrib ?

[Flarna]

I have already a branch with the changes for API but current version of prettier (used via gts) is not yet ready for override. Once a new prettier version is out I will create a PR there and also for contrib (uses also gts/prettier).

[dyladan]

I will remove gts/prettier from API and contrib like I did for this repo.

[Flarna]

I will remove gts/prettier from API and contrib like I did for this repo.

Sounds good. But it seems quite some formatting rules got lost in this repo. Not sure if this should be handled first.