Upgrade dependencies (#758)

* upgrade dependencies

* upgrade next-offline and react-codemirror2

* try and fix build by adding react-is

package.json

@@ -29,45 +29,46 @@
     "colornames": "^1.1.1",
     "cross-env": "^5.2.0",
     "dom-to-image": "^2.5.2",
-    "downshift": "^3.2.2",
+    "downshift": "^3.2.10",
     "dropperx": "^1.0.1",
     "escape-goat": "^2.0.0",
-    "graphql": "^14.1.1",
-    "highlight.js": "^9.14.2",
+    "graphql": "^14.3.0",
+    "highlight.js": "^9.15.6",
     "lodash.debounce": "^4.0.8",
     "lodash.omitby": "^4.6.0",
     "match-sorter": "^3.0.0",
     "morphmorph": "^0.1.0",
     "ms": "^2.0.0",
     "next": "^8.0.3",
-    "next-offline": "^3.3.6",
-    "prettier": "^1.16.4",
-    "react": "^16.8.3",
+    "next-offline": "^3.4.0",
+    "prettier": "^1.17.0",
+    "react": "^16.8.6",
     "react-click-outside": "^3.0.0",
-    "react-codemirror2": "^5.1.0",
-    "react-color": "^2.17.0",
+    "react-codemirror2": "^6.0.0",
+    "react-color": "^2.17.3",
     "react-copy-to-clipboard": "^5.0.1",
-    "react-dom": "^16.8.3",
+    "react-dom": "^16.8.6",
     "react-image-crop": "^6.0.16",
+    "react-is": "^16.8.6",
     "react-spinner": "^0.2.7",
     "react-syntax-highlight": "^15.3.1",
     "tohash": "^1.0.2",
     "url": "^0.11.0"
   },
   "devDependencies": {
-    "all-contributors-cli": "^6.0.0",
+    "all-contributors-cli": "^6.4.0",
     "babel-eslint": "^10.0.1",
     "clipboardy": "^2.0.0",
-    "cypress": "^3.1.5",
-    "eslint": "^5.13.0",
-    "eslint-plugin-import": "^2.16.0",
+    "cypress": "^3.2.0",
+    "eslint": "^5.16.0",
+    "eslint-plugin-import": "^2.17.2",
     "eslint-plugin-jsx-a11y": "^6.2.1",
-    "eslint-plugin-react": "^7.12.3",
-    "eslint-plugin-react-hooks": "^1.4.0",
-    "husky": "^2.0.0",
-    "jest": "^24.7.1",
-    "lint-staged": "^8.1.3",
-    "now": "^15.0.0",
+    "eslint-plugin-react": "^7.13.0",
+    "eslint-plugin-react-hooks": "^1.6.0",
+    "husky": "^2.2.0",
+    "jest": "^24.8.0",
+    "lint-staged": "^8.1.6",
+    "now": "^15.2.0",
     "wait-on": "^3.2.0"
   },
   "lint-staged": {