Pin dependencies

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
karma-mocha	devDependencies	pin	^2.0.1 -> 2.0.1
mocha (source)	devDependencies	pin	^7.2.0 -> 7.2.0
rollup (source)	devDependencies	pin	^2.11.2 -> 2.79.1
rollup-plugin-terser	devDependencies	pin	^6.1.0 -> 6.1.0
rollup-plugin-typescript2	devDependencies	pin	^0.27.1 -> 0.27.3
typescript (source)	devDependencies	pin	^3.9.3 -> 3.9.10

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