Specify yarn version

vladimyr · vladimyr · commit ca4492410714 · 2019-06-13T15:04:41.000+02:00
diff --git a/packages/gravatar-cli/package.json b/packages/gravatar-cli/package.json
@@ -32,7 +32,8 @@
   },
   "license": "MIT",
   "engines": {
-    "node": ">=8"
+    "node": ">=8",
+    "yarn": ">=1.16"
   },
   "bin": {
     "gravatar": "cli.js"
diff --git a/packages/gravatar/package.json b/packages/gravatar/package.json
@@ -34,7 +34,8 @@
   },
   "license": "MIT",
   "engines": {
-    "node": ">=8"
+    "node": ">=8",
+    "yarn": ">=1.16"
   },
   "bin": {
     "gravatar": "cli.js"
