updated dummy app js dependencies

Author: jonasjabari

spec/dummy/yarn.lock

@@ -4371,7 +4371,7 @@ matestack-ui-core@../../:
     v-runtime-template "^1.5.2"
     vue "^2.5.17"
     vuex "^3.0.1"
-    yarn "^1.17.3"
+    yarn "^1.22.0"
 
 md5.js@^1.3.4:
   version "1.3.5"
@@ -7870,7 +7870,7 @@ yargs@^7.0.0:
     y18n "^3.2.1"
     yargs-parser "^5.0.0"
 
-yarn@^1.17.3:
-  version "1.22.0"
-  resolved "https://registry.yarnpkg.com/yarn/-/yarn-1.22.0.tgz#acf82906e36bcccd1ccab1cfb73b87509667c881"
-  integrity sha512-KMHP/Jq53jZKTY9iTUt3dIVl/be6UPs2INo96+BnZHLKxYNTfwMmlgHTaMWyGZoO74RI4AIFvnWhYrXq2USJkg==
+yarn@^1.22.0:
+  version "1.22.4"
+  resolved "https://registry.yarnpkg.com/yarn/-/yarn-1.22.4.tgz#01c1197ca5b27f21edc8bc472cd4c8ce0e5a470e"
+  integrity sha512-oYM7hi/lIWm9bCoDMEWgffW8aiNZXCWeZ1/tGy0DWrN6vmzjCXIKu2Y21o8DYVBUtiktwKcNoxyGl/2iKLUNGA==