chore(deps): pin dependencies

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
ava (source)	devDependencies	pin	^3.5.1 -> 3.8.2
nodemon (source)	devDependencies	pin	^2.0.3 -> 2.0.4
npm-run-all	devDependencies	pin	^4.1.2 -> 4.1.5
supertest	devDependencies	pin	^3.0.0 -> 3.4.2
xo	devDependencies	pin	^0.18.2 -> 0.18.2

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

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