Use yarn workspaces

Author: jeskew

lerna.json

@@ -1,8 +1,5 @@
 {
-  "lerna": "2.0.0",
-  "packages": [
-    "packages/*"
-  ],
-  "version": "0.0.0",
-  "hoist": true
+  "lerna": "2.1.2",
+  "npmClient": "yarn",
+  "useWorkspaces": true
 }

package.json

@@ -18,8 +18,7 @@
   "dependencies": {
     "aws-sdk": "^2.7.0"
   },
-  "jest": {
-    "mapCoverage": true,
-    "testEnvironment": "node"
-  }
+  "workspaces": [
+    "packages/*"
+  ]
 }