Locking assets-webpack-plugin to less than 7.1.0

ztoben/assets-webpack-plugin#392 makes our integrity
calculation no longer work, as the files have not been emitted by the time
processOutput() is called. A better fix will need to be created.

Author: weaverryan

package.json

@@ -28,7 +28,7 @@
     "@babel/core": "^7.7.0",
     "@babel/plugin-syntax-dynamic-import": "^7.0.0",
     "@babel/preset-env": "^7.10.0",
-    "assets-webpack-plugin": "^7.0.0",
+    "assets-webpack-plugin": "7.0.*",
     "babel-loader": "^8.2.2",
     "chalk": "^4.0.0",
     "clean-webpack-plugin": "^3.0.0",

yarn.lock

@@ -1687,7 +1687,7 @@ assertion-error@^1.1.0:
   resolved "https://registry.yarnpkg.com/assertion-error/-/assertion-error-1.1.0.tgz#e60b6b0e8f301bd97e5375215bda406c85118c0b"
   integrity sha512-jgsaNduz+ndvGyFt3uSuWqvy4lCnIJiovtouQN5JZHOKCS2QuhEdbcQHFhVksz2N2U9hXJo8odG7ETyWlEeuDw==
 
-assets-webpack-plugin@^7.0.0:
+assets-webpack-plugin@7.0.*:
   version "7.0.0"
   resolved "https://registry.yarnpkg.com/assets-webpack-plugin/-/assets-webpack-plugin-7.0.0.tgz#c61ed7466f35ff7a4d90d7070948736f471b8804"
   integrity sha512-DMZ9r6HFxynWeONRMhSOFTvTrmit5dovdoUKdJgCG03M6CC7XiwNImPH+Ad1jaVrQ2n59e05lBhte52xPt4MSA==