fix(deps): update dependency @opencensus/propagation-stackdriver to v0.0.20

[renovate-bot]

This PR contains the following updates:

Package	Type	Update	Change
@opencensus/propagation-stackdriver	dependencies	patch	0.0.19 -> 0.0.20

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Release Notes

census-instrumentation/opencensus-node

v0.0.20

Compare Source

2c40254 fix(resources): GKE pod name label (#​728)
a6381af chore: update dependency grpc to 1.24.2 (#​750)
b6e6814 fix: core version (#​753)
7f1cddb chore(deps): bump handlebars (#​719)

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[codecov]

Codecov Report

Merging #714 into master will decrease coverage by 6.42%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #714      +/-   ##
==========================================
- Coverage   67.75%   61.33%   -6.43%     
==========================================
  Files          36       36              
  Lines       11187    11187              
  Branches      177      109      -68     
==========================================
- Hits         7580     6861     -719     
- Misses       3605     4321     +716     
- Partials        2        5       +3

Impacted Files	Coverage Δ
src/middleware/context.ts	50% <0%> (-50%)	⬇️
src/metadata.ts	44.38% <0%> (-45.41%)	⬇️
src/middleware/express/make-http-request.ts	59.52% <0%> (-40.48%)	⬇️
src/middleware/express/make-middleware.ts	61.11% <0%> (-38.89%)	⬇️
src/v2/metrics_service_v2_client.js	65.39% <0%> (-29.01%)	⬇️
src/index.ts	90.2% <0%> (-8.77%)	⬇️
src/v2/config_service_v2_client.js	84.28% <0%> (-8.37%)	⬇️
src/log.ts	95% <0%> (-3.88%)	⬇️
src/sink.ts	95.46% <0%> (-2.84%)	⬇️
src/v2/logging_service_v2_client.js	91.03% <0%> (-1.62%)	⬇️
... and 1 more

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