Bump handlebars from 4.3.4 to 4.7.6 (#308)

Bumps [handlebars](https://github.com/wycats/handlebars.js) from 4.3.4 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](https://github.com/wycats/handlebars.js/compare/v4.3.4...v4.7.6)

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package-lock.json

@@ -1927,13 +1927,6 @@
                 "delayed-stream": "~1.0.0"
             }
         },
-        "commander": {
-            "version": "2.20.1",
-            "resolved": "https://registry.npmjs.org/commander/-/commander-2.20.1.tgz",
-            "integrity": "sha512-cCuLsMhJeWQ/ZpsFTbE765kvVfoeSddc4nU3up4fV+fDBcfUXnbITJ+JzhkdjzOqhURjZgujxaioam4RM9yGUg==",
-            "dev": true,
-            "optional": true
-        },
         "component-emitter": {
             "version": "1.3.0",
             "resolved": "https://registry.npmjs.org/component-emitter/-/component-emitter-1.3.0.tgz",
@@ -3932,27 +3925,36 @@
             "dev": true
         },
         "handlebars": {
-            "version": "4.3.4",
-            "resolved": "https://registry.npmjs.org/handlebars/-/handlebars-4.3.4.tgz",
-            "integrity": "sha512-vvpo6mpK4ScNC1DbGRZ2d5BznS6ht0r1hi20RivsibMc6jNvFAeZQ6qk5VNspo6SOwVOJQbjHyBCpuS7BzA1pw==",
+            "version": "4.7.6",
+            "resolved": "https://registry.npmjs.org/handlebars/-/handlebars-4.7.6.tgz",
+            "integrity": "sha512-1f2BACcBfiwAfStCKZNrUCgqNZkGsAT7UM3kkYtXuLo0KnaVfjKOyf7PRzB6++aK9STyT1Pd2ZCPe3EGOXleXA==",
             "dev": true,
             "requires": {
+                "minimist": "^1.2.5",
                 "neo-async": "^2.6.0",
-                "optimist": "^0.6.1",
                 "source-map": "^0.6.1",
-                "uglify-js": "^3.1.4"
+                "uglify-js": "^3.1.4",
+                "wordwrap": "^1.0.0"
             },
             "dependencies": {
+                "minimist": {
+                    "version": "1.2.5",
+                    "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.5.tgz",
+                    "integrity": "sha512-FM9nNUYrRBAELZQT3xeZQ7fmMOBg6nWNmJKTcgsJeaLstP/UODVpGsr5OhXhhXg6f+qtJ8uiZ+PUxkDWcgIXLw==",
+                    "dev": true
+                },
                 "uglify-js": {
-                    "version": "3.6.0",
-                    "resolved": "https://registry.npmjs.org/uglify-js/-/uglify-js-3.6.0.tgz",
-                    "integrity": "sha512-W+jrUHJr3DXKhrsS7NUVxn3zqMOFn0hL/Ei6v0anCIMoKC93TjcflTagwIHLW7SfMFfiQuktQyFVCFHGUE0+yg==",
+                    "version": "3.10.3",
+                    "resolved": "https://registry.npmjs.org/uglify-js/-/uglify-js-3.10.3.tgz",
+                    "integrity": "sha512-Lh00i69Uf6G74mvYpHCI9KVVXLcHW/xu79YTvH7Mkc9zyKUeSPz0owW0dguj0Scavns3ZOh3wY63J0Zb97Za2g==",
                     "dev": true,
-                    "optional": true,
-                    "requires": {
-                        "commander": "~2.20.0",
-                        "source-map": "~0.6.1"
-                    }
+                    "optional": true
+                },
+                "wordwrap": {
+                    "version": "1.0.0",
+                    "resolved": "https://registry.npmjs.org/wordwrap/-/wordwrap-1.0.0.tgz",
+                    "integrity": "sha1-J1hIEIkUVqQXHI0CJkQa3pDLyus=",
+                    "dev": true
                 }
             }
         },
@@ -6401,24 +6403,6 @@
                 }
             }
         },
-        "optimist": {
-            "version": "0.6.1",
-            "resolved": "https://registry.npmjs.org/optimist/-/optimist-0.6.1.tgz",
-            "integrity": "sha1-2j6nRob6IaGaERwybpDrFaAZZoY=",
-            "dev": true,
-            "requires": {
-                "minimist": "~0.0.1",
-                "wordwrap": "~0.0.2"
-            },
-            "dependencies": {
-                "minimist": {
-                    "version": "0.0.10",
-                    "resolved": "https://registry.npmjs.org/minimist/-/minimist-0.0.10.tgz",
-                    "integrity": "sha1-3j+YVD2/lggr5IrRoMfNqDYwHc8=",
-                    "dev": true
-                }
-            }
-        },
         "optionator": {
             "version": "0.8.2",
             "resolved": "https://registry.npmjs.org/optionator/-/optionator-0.8.2.tgz",