Bump handlebars from 4.0.11 to 4.7.6

Bumps [handlebars](https://github.com/wycats/handlebars.js) from 4.0.11 to 4.7.6.
- [Release notes](https://github.com/wycats/handlebars.js/releases)
- [Changelog](https://github.com/handlebars-lang/handlebars.js/blob/master/release-notes.md)
- [Commits](handlebars-lang/handlebars.js@v4.0.11...v4.7.6)

Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -39,7 +39,7 @@
     "colors": "1.3.1",
     "commander": "2.17.1",
     "fs-extra": "7.0.0",
-    "handlebars": "4.0.11",
+    "handlebars": "4.7.6",
     "js-yaml": "3.12.0",
     "lodash": "4.17.10",
     "mocha-silent-reporter": "1.0.0",