Pin dependencies

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change	References
chai	devDependencies	pin	^4.2.0 -> 4.2.0	homepage, source
eslint	devDependencies	pin	^5.9.0 -> 5.9.0	homepage, source
eslint-config-airbnb-base	devDependencies	pin	^13.1.0 -> 13.1.0	source
eslint-plugin-import	devDependencies	pin	^2.14.0 -> 2.14.0	source
grunt	devDependencies	pin	^1.0.3 -> 1.0.3	homepage, source
grunt-contrib-watch	devDependencies	pin	^1.1.0 -> 1.1.0	source
grunt-mocha-cli	devDependencies	pin	^4.0.0 -> 4.0.0	source
gruntify-eslint	devDependencies	pin	^5.0.0 -> 5.0.0	source
mocha	devDependencies	pin	^5.2.0 -> 5.2.0	homepage, source
mock-require	devDependencies	pin	^3.0.2 -> 3.0.2	source
sinon	devDependencies	pin	^7.1.1 -> 7.1.1	homepage, source
supertest	devDependencies	pin	^3.3.0 -> 3.3.0	source

:pushpin: Important: Renovate will wait until you have merged this Pin PR before creating any upgrade PRs for the affected packages. Add the preset :preserveSemverRanges your config if you instead don't wish to pin dependencies.

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