Update popper, fix #900

package.json

@@ -30,8 +30,9 @@
     "@babel/preset-react": "^7.6.3",
     "@emotion/core": "^10.0.27",
     "@grafana/data": "^6.7.0",
-    "@grafana/ui": "^6.7.0",
     "@grafana/runtime": "^6.7.0",
+    "@grafana/ui": "^6.7.0",
+    "@popperjs/core": "^2.4.0",
     "@types/classnames": "^2.2.6",
     "@types/grafana": "github:CorpGlory/types-grafana",
     "@types/jest": "^23.1.1",
@@ -68,9 +69,9 @@
     "ng-annotate-webpack-plugin": "^0.3.0",
     "node-sass": "^4.13.0",
     "prop-types": "^15.6.2",
-    "react": "^16.7.0",
-    "react-dom": "^16.7.0",
-    "react-popper": "^1.3.2",
+    "react": "^16.13.1",
+    "react-dom": "^16.13.1",
+    "react-popper": "^2.2.3",
     "react-table-6": "^6.8.6",
     "react-test-renderer": "^16.7.0",
     "react-transition-group": "^2.5.2",