Update gatsby in /docs from 1.9.146 to 1.9.147

[dependencies]

Dependencies.io has updated gatsby (a npm dependency in /docs) from "1.9.146" to "1.9.147".

1.9.147

No content found. Please open an issue at https://github.com/dependencies-io/support if you think this content could have been found.

[codecov]

Codecov Report

Merging #2535 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #2535   +/-   ##
=======================================
  Coverage   16.87%   16.87%           
=======================================
  Files         307      307           
  Lines        7792     7792           
  Branches      785      776    -9     
=======================================
  Hits         1315     1315           
+ Misses       5846     5843    -3     
- Partials      631      634    +3

Impacted Files	Coverage Δ
app/vue/src/server/config/babel.js	0% <0%> (-100%)	⬇️
app/vue/src/server/babel_config.js	0% <0%> (-77.42%)	⬇️
addons/knobs/src/components/PropField.js	10.63% <0%> (ø)	⬆️
addons/knobs/src/components/types/Select.js	7.93% <0%> (ø)	⬆️
addons/graphql/src/components/FullScreen/index.js	0% <0%> (ø)	⬆️
lib/ui/src/modules/ui/components/layout/usplit.js	22.58% <0%> (ø)	⬆️
addons/a11y/src/components/Report/index.js	0% <0%> (ø)	⬆️
addons/info/src/components/markdown/code.js	24.13% <0%> (ø)	⬆️
.../ui/src/modules/ui/components/layout/dimensions.js	7.81% <0%> (ø)	⬆️
addons/jest/src/hoc/provideJestResult.js	0% <0%> (ø)	⬆️
... and 34 more

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