[Import Prep][1/n] Upgrade dependencies (#128)

Test Plan
===

1. `yarn lint`
1. `yarn flow`: Speedscope no longer has any errors (Flow type
   generation fixed in updated Speedscope fork). Works towards #38
1. `yarn test`
1. `yarn start`

package.json

@@ -11,39 +11,39 @@
   "author": "Brian Vaughn <bvaughn@fb.com>",
   "license": "MIT",
   "dependencies": {
-    "@elg/speedscope": "1.9.0-846c4e7",
+    "@elg/speedscope": "1.9.0-c46bbab",
     "array-binsearch": "^1.0.1",
     "clipboard-js": "^0.3.6",
     "d3-hierarchy": "^1.1.9",
     "lodash.clonedeep": "^4.5.0",
     "memoize-one": "^5.1.1",
     "nullthrows": "^1.1.1",
     "pretty-ms": "^7.0.0",
-    "react": "experimental",
-    "react-dom": "experimental",
+    "react": "^0.0.0-experimental-94c0244ba",
+    "react-dom": "^0.0.0-experimental-94c0244ba",
     "react-virtualized-auto-sizer": "^1.0.2",
     "scheduler": "^0.19.1"
   },
   "devDependencies": {
     "@babel/core": "^7.11.1",
-    "@testing-library/jest-dom": "^5.11.2",
+    "@testing-library/jest-dom": "^5.11.3",
     "@testing-library/react": "^10.4.8",
     "babel-eslint": "^10.1.0",
-    "babel-jest": "^26.2.2",
+    "babel-jest": "^26.3.0",
     "babel-preset-react-app": "^9.1.2",
     "confusing-browser-globals": "^1.0.9",
-    "eslint": "^7.6.0",
+    "eslint": "^7.7.0",
     "eslint-config-fbjs": "^1.1.1",
     "eslint-config-prettier": "^6.11.0",
     "eslint-plugin-babel": "^5.3.1",
     "eslint-plugin-flowtype": "^5.2.0",
     "eslint-plugin-jest": "^23.20.0",
     "eslint-plugin-no-for-of-loops": "^1.0.1",
     "eslint-plugin-prettier": "^3.1.4",
-    "eslint-plugin-react": "^7.20.5",
-    "flow-bin": "^0.130.0",
+    "eslint-plugin-react": "^7.20.6",
+    "flow-bin": "^0.131.0",
     "identity-obj-proxy": "^3.0.0",
-    "jest": "^26.2.2",
+    "jest": "^26.4.0",
     "parcel": "2.0.0-beta.1",
     "postcss-modules": "^3.2.0",
     "prettier": "1.19.1"