chore(deps): update dependency handlebars to v4.7.7 (#61)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [handlebars](http://www.handlebarsjs.com/) ([source](https://togithub.com/wycats/handlebars.js)) | [`^4.0.12` -> `4.7.7`](https://renovatebot.com/diffs/npm/handlebars/4.7.6/4.7.7) | [![age](https://badges.renovateapi.com/packages/npm/handlebars/4.7.7/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/npm/handlebars/4.7.7/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/npm/handlebars/4.7.7/compatibility-slim/4.7.6)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/npm/handlebars/4.7.7/confidence-slim/4.7.6)](https://docs.renovatebot.com/merge-confidence/) |

---

### Release Notes

<details>
<summary>wycats/handlebars.js</summary>

### [`v4.7.7`](https://togithub.com/wycats/handlebars.js/blob/master/release-notes.md#v477---February-15th-2021)

[Compare Source](https://togithub.com/wycats/handlebars.js/compare/v4.7.6...v4.7.7)

-   fix weird error in integration tests - [`eb860c0`](https://togithub.com/wycats/handlebars.js/commit/eb860c0)
-   fix: check prototype property access in strict-mode ([#&#8203;1736](https://togithub.com/wycats/handlebars.js/issues/1736)) - [`b6d3de7`](https://togithub.com/wycats/handlebars.js/commit/b6d3de7)
-   fix: escape property names in compat mode ([#&#8203;1736](https://togithub.com/wycats/handlebars.js/issues/1736)) - [`f058970`](https://togithub.com/wycats/handlebars.js/commit/f058970)
-   refactor: In spec tests, use expectTemplate over equals and shouldThrow ([#&#8203;1683](https://togithub.com/wycats/handlebars.js/issues/1683)) - [`77825f8`](https://togithub.com/wycats/handlebars.js/commit/77825f8)
-   chore: start testing on Node.js 12 and 13 - [`3789a30`](https://togithub.com/wycats/handlebars.js/commit/3789a30)

(POSSIBLY) BREAKING CHANGES:

-   the changes from version [4.6.0](https://togithub.com/handlebars-lang/handlebars.js/blob/master/release-notes.md#v460---january-8th-2020) now also apply
    in when using the compile-option "strict: true". Access to prototype properties is forbidden completely by default, specific properties or methods
    can be allowed via runtime-options. See [#&#8203;1633](https://togithub.com/wycats/handlebars.js/issues/1633) for details. If you are using Handlebars as documented, you should not be accessing prototype properties
    from your template anyway, so the changes should not be a problem for you. Only the use of undocumented features can break your build.

That is why we only bump the patch version despite mentioning breaking changes.

[Commits](https://togithub.com/wycats/handlebars.js/compare/v4.7.6...v4.7.7)

</details>

---

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---

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package.json

@@ -45,7 +45,7 @@
     "eslint-plugin-jsdoc": "^30.6.3",
     "fast-sass-loader": "^1.5.0",
     "file-loader": "^1.1.11",
-    "handlebars": "^4.0.12",
+    "handlebars": "4.7.7",
     "handlebars-loader": "^1.7.0",
     "html-webpack-plugin": "^4.5.1",
     "http-server": "^0.12.3",

yarn.lock

@@ -6320,10 +6320,10 @@ handlebars-loader@^1.7.0:
     loader-utils "1.0.x"
     object-assign "^4.1.0"
 
-handlebars@^4.0.12:
-  version "4.7.6"
-  resolved "https://registry.yarnpkg.com/handlebars/-/handlebars-4.7.6.tgz#d4c05c1baf90e9945f77aa68a7a219aa4a7df74e"
-  integrity sha512-1f2BACcBfiwAfStCKZNrUCgqNZkGsAT7UM3kkYtXuLo0KnaVfjKOyf7PRzB6++aK9STyT1Pd2ZCPe3EGOXleXA==
+handlebars@4.7.7:
+  version "4.7.7"
+  resolved "https://registry.yarnpkg.com/handlebars/-/handlebars-4.7.7.tgz#9ce33416aad02dbd6c8fafa8240d5d98004945a1"
+  integrity sha512-aAcXm5OAfE/8IXkcZvCepKU3VzW1/39Fb5ZuqMtgI/hT8X2YgoMvBY5dLhq/cpOvw7Lk1nK/UF71aLG/ZnVYRA==
   dependencies:
     minimist "^1.2.5"
     neo-async "^2.6.0"