build(deps): update angular-cli to 7c4c781

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
@angular-devkit/build-angular	devDependencies	digest	9086b82 -> 7c4c781
@angular/cli	devDependencies	digest	3e1325c -> 858ee21

🔡 If you wish to disable git hash updates, add ":disableDigestUpdates" to the extends array in your config.

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