Bump yarn from 1.19.1 to 1.22.0

Bumps [yarn](https://github.com/yarnpkg/yarn) from 1.19.1 to 1.22.0.
- [Release notes](https://github.com/yarnpkg/yarn/releases)
- [Changelog](https://github.com/yarnpkg/yarn/blob/master/CHANGELOG.md)
- [Commits](yarnpkg/yarn@v1.19.1...v1.22.0)

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

Author: dependabot[bot]

package.json

@@ -9,7 +9,7 @@
     "v-runtime-template": "^1.5.2",
     "vue": "^2.5.17",
     "vuex": "^3.0.1",
-    "yarn": "^1.17.3"
+    "yarn": "^1.22.0"
   },
   "exports": {
     "./concepts/": "./app/concepts/matestack/ui/core/"

yarn.lock

@@ -101,7 +101,7 @@ vuex@^3.0.1:
   resolved "https://registry.yarnpkg.com/vuex/-/vuex-3.1.1.tgz#0c264bfe30cdbccf96ab9db3177d211828a5910e"
   integrity sha512-ER5moSbLZuNSMBFnEBVGhQ1uCBNJslH9W/Dw2W7GZN23UQA69uapP5GTT9Vm8Trc0PzBSVt6LzF3hGjmv41xcg==
 
-yarn@^1.17.3:
-  version "1.19.1"
-  resolved "https://registry.yarnpkg.com/yarn/-/yarn-1.19.1.tgz#14b92410dd1ba5bab87a12b4a3d807f4569bea97"
-  integrity sha512-gBnfbL9rYY05Gt0cjJhs/siqQXHYlZalTjK3nXn2QO20xbkIFPob+LlH44ML47GcR4VU9/2dYck1BWFM0Javxw==
+yarn@^1.22.0:
+  version "1.22.0"
+  resolved "https://registry.yarnpkg.com/yarn/-/yarn-1.22.0.tgz#acf82906e36bcccd1ccab1cfb73b87509667c881"
+  integrity sha512-KMHP/Jq53jZKTY9iTUt3dIVl/be6UPs2INo96+BnZHLKxYNTfwMmlgHTaMWyGZoO74RI4AIFvnWhYrXq2USJkg==