Merge pull request #309 from amplitude/AMP-70918-lerna3

[AMP-70918] Lerna 2 to 3

Author: kelsonpw

package.json

@@ -20,7 +20,7 @@
     "flow-bin": "^0.100.0",
     "husky": "^1.3.1",
     "jest": "^24.8.0",
-    "lerna": "^3.13.4",
+    "lerna": "3",
     "prettier": "^1.14.3",
     "pretty-quick": "^1.4.1"
   },

yarn.lock

@@ -5172,7 +5172,7 @@ left-pad@^1.3.0:
   resolved "https://registry.yarnpkg.com/left-pad/-/left-pad-1.3.0.tgz#5b8a3a7765dfe001261dde915589e782f8c94d1e"
   integrity sha512-XI5MPzVNApjAyhQzphX8BkmKsKUxD4LdyK24iZeQGinBN9yTQT3bFlCBy/aVx2HrNcqQGsdot8ghrjyrvMCoEA==
 
-lerna@^3.13.4:
+lerna@3:
   version "3.22.1"
   resolved "https://registry.yarnpkg.com/lerna/-/lerna-3.22.1.tgz#82027ac3da9c627fd8bf02ccfeff806a98e65b62"
   integrity sha512-vk1lfVRFm+UuEFA7wkLKeSF7Iz13W+N/vFd48aW2yuS7Kv0RbNm2/qcDPV863056LMfkRlsEe+QYOw3palj5Lg==