chore: update dependencies gts and codecov

[mayurkale22]

Which problem is this PR solving?

• Update dependency gts to 1.1.0 (latest)

• Update dependency codecov to 3.6.1 (latest)

• Update description of core and base packages.

[codecov-io]

Codecov Report

Merging #517 into master will increase coverage by 0.11%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #517      +/-   ##
==========================================
+ Coverage   92.45%   92.57%   +0.11%     
==========================================
  Files         146      145       -1     
  Lines        7063     7120      +57     
  Branches      627      621       -6     
==========================================
+ Hits         6530     6591      +61     
+ Misses        533      529       -4

Impacted Files	Coverage Δ
...telemetry-tracing/src/export/BatchSpanProcessor.ts	100% <0%> (ø)	⬆️
packages/opentelemetry-metrics/src/Metric.ts	88.23% <0%> (ø)	⬆️
...es/opentelemetry-tracing/src/MultiSpanProcessor.ts	100% <0%> (ø)	⬆️
packages/opentelemetry-tracing/src/config.ts	100% <0%> (ø)	⬆️
packages/opentelemetry-metrics/src/Utils.ts	100% <0%> (ø)	⬆️
packages/opentelemetry-metrics/src/Handle.ts	95.55% <0%> (ø)	⬆️
packages/opentelemetry-metrics/src/LabelSet.ts	83.33% <0%> (ø)	⬆️
...emetry-metrics/src/export/ConsoleMetricExporter.ts	93.75% <0%> (ø)	⬆️
packages/opentelemetry-metrics/src/Meter.ts	96.92% <0%> (ø)	⬆️
...ry-scope-async-hooks/src/AsyncHooksScopeManager.ts	97.67% <0%> (ø)	⬆️
... and 61 more