build(deps): bump json5, @angular-devkit/build-angular, @angular-devkit/build-optimizer and webpack#253
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dependabot[bot] wants to merge 1 commit intomasterfrom dependabot/npm_and_yarn/json5-and-angular-devkit/build-angular-and-angular-devkit/build-optimizer-and-webpack-2.2.2
+21,429-15,018
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