chore(deps): update dependency sinon-chai to v3

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
sinon-chai	2.14.0 -> 3.7.0

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Release Notes

domenic/sinon-chai

v3.7.0

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• No longer check for the max sinon version (#​150)

v3.6.0

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• Add support for sinon 10 (#​149)

v3.5.0

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Features

• Add support for sinon 9 (#​147)

v3.4.0

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Features

• Add support for sinon 8 (#​143)

v3.3.0

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Added support for Sinon v7.x (@​JoeTheFkingFrypan, #​131)

v3.2.0

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Added support for Sinon v6.x. (@​mattbaileyuk, #​127)

v3.1.0

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Added support for Sinon v5.x. (@​dostu, #​122)

Added calledOnceWith and calledOnceWithExactly matchers. (@​JayAndCatchFire, #​117)

v3.0.0

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• Required Node.js version 4 or later
• Required Sinon version 4 or later
• Required Chai version 4 or later

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Configuration

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[codecov]

Codecov Report

Merging #96 (edf5134) into develop (4a9d323) will decrease coverage by 92.96%.
The diff coverage is n/a.

❗ Current head edf5134 differs from pull request most recent head a6b5906. Consider uploading reports for the commit a6b5906 to get more accurate results

@@            Coverage Diff            @@
##           develop   #96       +/-   ##
=========================================
- Coverage    92.96%     0   -92.97%     
=========================================
  Files           27     0       -27     
  Lines          398     0      -398     
  Branches        60     0       -60     
=========================================
- Hits           370     0      -370     
+ Misses          28     0       -28     

Impacted Files	Coverage Δ
src/connectors/connection.js
src/connectors/cover_schema.js
src/connectors/feed.js
src/connectors/item.js
src/schema/enums/dateFormat.js
src/schema/queries/resolvers/rootQuery.js
src/schema/queries/rootQuery.js
src/schema/resolvers.js
src/schema/scalars/bigInt.js
src/schema/scalars/resolvers.js
... and 13 more

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