[Security] Bump handlebars from 4.1.2 to 4.7.3 (#2138)

Bumps [handlebars](https://github.com/wycats/handlebars.js) from 4.1.2 to 4.7.3. **This update includes a security fix.**
- [Release notes](https://github.com/wycats/handlebars.js/releases)
- [Changelog](https://github.com/wycats/handlebars.js/blob/master/release-notes.md)
- [Commits](https://github.com/wycats/handlebars.js/compare/v4.1.2...v4.7.3)

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

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>
Co-authored-by: Nicolás Venturo <nicolas.venturo@gmail.com>

package-lock.json

@@ -13781,17 +13781,6 @@
             "glogg": "^1.0.0"
           }
         },
-        "handlebars": {
-          "version": "4.1.2",
-          "resolved": "https://registry.npmjs.org/handlebars/-/handlebars-4.1.2.tgz",
-          "integrity": "sha512-nvfrjqvt9xQ8Z/w0ijewdD/vvWDTOweBUm96NTr66Wfvo1mJenBLwcYmPs3TIBP5ruzYGD7Hx/DaM9RmhroGPw==",
-          "requires": {
-            "neo-async": "^2.6.0",
-            "optimist": "^0.6.1",
-            "source-map": "^0.6.1",
-            "uglify-js": "^3.1.4"
-          }
-        },
         "har-schema": {
           "version": "2.0.0",
           "resolved": "https://registry.npmjs.org/har-schema/-/har-schema-2.0.0.tgz",
@@ -19306,7 +19295,6 @@
           "version": "3.6.0",
           "resolved": "https://registry.npmjs.org/uglify-js/-/uglify-js-3.6.0.tgz",
           "integrity": "sha512-W+jrUHJr3DXKhrsS7NUVxn3zqMOFn0hL/Ei6v0anCIMoKC93TjcflTagwIHLW7SfMFfiQuktQyFVCFHGUE0+yg==",
-          "optional": true,
           "requires": {
             "commander": "~2.20.0",
             "source-map": "~0.6.1"