Pin dependencies

[renovate-bot]

This PR contains the following updates:

Package	Type	Update	Change
@ampproject/rollup-plugin-closure-compiler	devDependencies	pin	^0.24.0 -> 0.24.0
@babel/core (source)	devDependencies	pin	^7.9.0 -> 7.14.2
@babel/plugin-proposal-class-properties (source)	devDependencies	pin	^7.8.3 -> 7.13.0
@babel/preset-env (source)	devDependencies	pin	^7.9.0 -> 7.14.2
@rollup/plugin-json	devDependencies	pin	^4.0.2 -> 4.1.0
@types/amphtml-validator	devDependencies	pin	^1.0.1 -> 1.0.1
@types/css-tree	devDependencies	pin	^1.0.3 -> 1.0.5
@types/jest	devDependencies	pin	^25.1.4 -> 25.2.3
dotenv	dependencies	pin	^8.2.0 -> 8.6.0
express (source)	dependencies	pin	^4.17.1 -> 4.17.1
gts	devDependencies	pin	^1.1.2 -> 1.1.2
jest (source)	devDependencies	pin	^25.2.0 -> 25.5.4
jest-environment-jsdom-fourteen	devDependencies	pin	^1.0.1 -> 1.0.1
jest-puppeteer	devDependencies	pin	^4.4.0 -> 4.4.0
node-fetch	dependencies	pin	^2.6.0 -> 2.6.1
parcel-bundler	dependencies	pin	^1.12.4 -> 1.12.5
prettier (source)	devDependencies	pin	^2.0.2 -> 2.3.0
puppeteer	devDependencies	pin	^2.1.1 -> 2.1.1
rollup (source)	devDependencies	pin	^2.2.0 -> 2.48.0
rollup-plugin-babel	devDependencies	pin	^4.4.0 -> 4.4.0
rollup-plugin-commonjs	devDependencies	pin	^10.1.0 -> 10.1.0
rollup-plugin-node-resolve	devDependencies	pin	^5.2.0 -> 5.2.0
rollup-plugin-terser	devDependencies	pin	^5.3.0 -> 5.3.1
ts-jest (source)	devDependencies	pin	^25.2.1 -> 25.5.1
tslint (source)	devDependencies	pin	^6.1.0 -> 6.1.3
typescript (source)	devDependencies	pin	^3.8.3 -> 3.9.9

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