Bump handlebars from 4.1.2 to 4.3.0 (#147)

Bumps [handlebars](https://github.com/wycats/handlebars.js) from 4.1.2 to 4.3.0.
- [Release notes](https://github.com/wycats/handlebars.js/releases)
- [Changelog](https://github.com/wycats/handlebars.js/blob/master/release-notes.md)
- [Commits](handlebars-lang/handlebars.js@v4.1.2...v4.3.0)

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

yarn.lock

@@ -1967,9 +1967,9 @@ growl@1.10.5:
   integrity sha512-qBr4OuELkhPenW6goKVXiv47US3clb3/IbuWF9KNKEijAy9oeHxU9IgzjvJhHkUzhaj7rOUD7+YGWqUjLp5oSA==
 
 handlebars@^4.1.2:
-  version "4.1.2"
-  resolved "https://registry.yarnpkg.com/handlebars/-/handlebars-4.1.2.tgz#b6b37c1ced0306b221e094fc7aca3ec23b131b67"
-  integrity sha512-nvfrjqvt9xQ8Z/w0ijewdD/vvWDTOweBUm96NTr66Wfvo1mJenBLwcYmPs3TIBP5ruzYGD7Hx/DaM9RmhroGPw==
+  version "4.3.0"
+  resolved "https://registry.yarnpkg.com/handlebars/-/handlebars-4.3.0.tgz#427391b584626c9c9c6ffb7d1fb90aa9789221cc"
+  integrity sha512-7XlnO8yBXOdi7AzowjZssQr47Ctidqm7GbgARapOaqSN9HQhlClnOkR9HieGauIT3A8MBC6u9wPCXs97PCYpWg==
   dependencies:
     neo-async "^2.6.0"
     optimist "^0.6.1"