add react-tippy

yarn.lock

@@ -6904,6 +6904,10 @@ pn@^1.1.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/pn/-/pn-1.1.0.tgz#e2f4cef0e219f463c179ab37463e4e1ecdccbafb"
 
+popper.js@^1.11.1:
+  version "1.14.3"
+  resolved "https://registry.yarnpkg.com/popper.js/-/popper.js-1.14.3.tgz#1438f98d046acf7b4d78cd502bf418ac64d4f095"
+
 postcss-calc@^5.2.0:
   version "5.3.1"
   resolved "https://registry.yarnpkg.com/postcss-calc/-/postcss-calc-5.3.1.tgz#77bae7ca928ad85716e2fda42f261bf7c1d65b5e"
@@ -7822,6 +7826,12 @@ react-test-renderer@^16.0.0-0:
     object-assign "^4.1.1"
     prop-types "^15.6.0"
 
+react-tippy@^1.2.2:
+  version "1.2.2"
+  resolved "https://registry.yarnpkg.com/react-tippy/-/react-tippy-1.2.2.tgz#061467d34d29e7a5a9421822d125c451d6bb5153"
+  dependencies:
+    popper.js "^1.11.1"
+
 react-transition-group@^2.0.0, react-transition-group@^2.2.0:
   version "2.2.1"
   resolved "https://registry.yarnpkg.com/react-transition-group/-/react-transition-group-2.2.1.tgz#e9fb677b79e6455fd391b03823afe84849df4a10"