Pin dependencies

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
@babel/plugin-proposal-class-properties (source)	dependencies	pin	^7.8.3 -> 7.12.1
@babel/plugin-proposal-decorators (source)	dependencies	pin	^7.8.3 -> 7.12.12
@babel/plugin-proposal-export-default-from (source)	dependencies	pin	^7.8.3 -> 7.12.1
@babel/plugin-transform-object-assign (source)	dependencies	pin	^7.8.3 -> 7.12.1
@babel/plugin-transform-runtime (source)	dependencies	pin	^7.9.0 -> 7.12.10
babel-plugin-module-resolver	dependencies	pin	^4.0.0 -> 4.1.0
clean-webpack-plugin	dependencies	pin	^3.0.0 -> 3.0.0
css-loader	dependencies	pin	^5.0.1 -> 5.0.1
node-sass	dependencies	pin	^5.0.0 -> 5.0.0
resolve-url-loader	dependencies	pin	^3.1.1 -> 3.1.2
sass-loader	dependencies	pin	^10.1.0 -> 10.1.1
webpack-cli	dependencies	pin	^3.3.11 -> 3.3.12
webpack-subresource-integrity	dependencies	pin	^1.4.0 -> 1.5.2

📌 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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