Bump shakapacker from 6.6.0 to 7.0.0

Bumps [shakapacker](https://github.com/shakacode/shakapacker) from 6.6.0 to 7.0.0.
- [Changelog](https://github.com/shakacode/shakapacker/blob/master/CHANGELOG.md)
- [Commits](shakacode/shakapacker@v6.6.0...v7.0.0)

---
updated-dependencies:
- dependency-name: shakapacker
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

package.json

@@ -39,7 +39,7 @@
     "rails-erb-loader": "usabilityhub/rails-erb-loader#master",
     "sass": "^1.63.6",
     "sass-loader": "^13.3.1",
-    "shakapacker": "6.6.0",
+    "shakapacker": "7.0.0",
     "sortablejs": "^1.15.0",
     "sorttable": "^1.0.2",
     "style-loader": "^3.3.3",

yarn.lock

@@ -4076,10 +4076,10 @@ setprototypeof@1.2.0:
   resolved "https://registry.yarnpkg.com/setprototypeof/-/setprototypeof-1.2.0.tgz#66c9a24a73f9fc28cbe66b09fed3d33dcaf1b424"
   integrity sha512-E5LDX7Wrp85Kil5bhZv46j8jOeboKq5JMmYM3gVGdGH8xFpPWXUMsNrlODCrkoxMEeNi/XZIwuRvY4XNwYMJpw==
 
-shakapacker@6.6.0:
-  version "6.6.0"
-  resolved "https://registry.yarnpkg.com/shakapacker/-/shakapacker-6.6.0.tgz#1e372a7ce6fa93f1a7bd1820737b8168679eb220"
-  integrity sha512-7sNnv8PXMlgm2Ob7vZOayLKu0+PPMN3q0HEyAlkFIJtHJt7wA3p1rObhlk0/OrNeBa4dio/9HiBUeEU7bZsHvw==
+shakapacker@7.0.0:
+  version "7.0.0"
+  resolved "https://registry.yarnpkg.com/shakapacker/-/shakapacker-7.0.0.tgz#788c96e86eb78e44ee84c3cc03b7c091e4621fc3"
+  integrity sha512-yL5lbCdgtI8nUxZHarL7X5aB40r069wAunHwb59Hgw1gPg6/nMuYo7ofNTGXg11v1eunwAdjx8EfYnk4XwX27Q==
   dependencies:
     glob "^7.2.0"
     js-yaml "^4.1.0"