Add timezone-mock package

package.json

@@ -197,6 +197,7 @@
     "stylelint": "^10.1.0",
     "stylelint-config-recommended": "^2.2.0",
     "stylelint-scss": "^3.9.2",
+    "timezone-mock": "^1.0.8",
     "vue-jest": "^4.0.0-beta.2",
     "webpack-dev-server": "^3.1.14",
     "yarn-deduplicate": "^1.1.1"

yarn.lock

@@ -11815,6 +11815,11 @@ timers-browserify@^2.0.4:
   dependencies:
     setimmediate "^1.0.4"
 
+timezone-mock@^1.0.8:
+  version "1.0.8"
+  resolved "https://registry.yarnpkg.com/timezone-mock/-/timezone-mock-1.0.8.tgz#1b9f7af13f2bf84b7aa3d3d6e24aa17255b6037d"
+  integrity sha512-7dgx34HJPY8O/c5dbqG+I9S3TVDjrfssXmS8BNqiy8sdYvYDfM7shHpNA6VTDQWcDGyv43bE3El6YuFDQf1X3g==
+
 tiny-emitter@^2.0.0:
   version "2.0.2"
   resolved "https://registry.yarnpkg.com/tiny-emitter/-/tiny-emitter-2.0.2.tgz#82d27468aca5ade8e5fd1e6d22b57dd43ebdfb7c"