Bump handlebars, karma-coverage and grunt-karma-coveralls#2

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dependabot/npm_and_yarn/handlebars-and-karma-coverage-and-grunt-karma-coveralls-4.7.8LightmakerCanada/BootstrapFormHelpers:dependabot/npm_and_yarn/handlebars-and-karma-coverage-and-grunt-karma-coveralls-4.7.8Copy head branch name to clipboard