Upgrade jest and flow-bin deps (#2435)

Summary:
`handlebars` was a dependency of `jest` but has since been removed, so this should also close facebookarchive/draft-js#2428.
Pull Request resolved: facebookarchive/draft-js#2435

Test Plan: `npm run jest` && `npm run flow`

Reviewed By: kedromelon

Differential Revision: D21653714

Pulled By: mrkev

fbshipit-source-id: 7b2139663b48d9ec674254f6c5dfd1a68f60a3b0

package.json

@@ -62,7 +62,7 @@
     "eslint-plugin-prettier": "^3.1.2",
     "eslint-plugin-react": "^7.17.0",
     "fbjs-scripts": "^1.2.0",
-    "flow-bin": "^0.123.0",
+    "flow-bin": "0.125",
     "gulp": "^4.0.2",
     "gulp-babel": "^8.0.0",
     "gulp-clean-css": "^4.2.0",
@@ -73,7 +73,7 @@
     "gulp-if": "^3.0.0",
     "gulp-rename": "2",
     "gulp-util": "^3.0.6",
-    "jest": "^24.9.0",
+    "jest": "26",
     "prettier": "1.19.1",
     "react": "^16.8.0",
     "react-dom": "^16.8.0",

src/.flowconfig

@@ -51,4 +51,4 @@ unsafe-getters-setters
 ; nonstrict-import
 
 [version]
-^0.123.0
+^0.125.0