build(deps-dev): bump immutable from 5.1.2 to 5.1.5 in /frontend/src/angular#61

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dependabot/npm_and_yarn/frontend/src/angular/immutable-5.1.5Angular2Guy/AngularAndSpringWithMaps:dependabot/npm_and_yarn/frontend/src/angular/immutable-5.1.5Copy head branch name to clipboard