Required space before brackets in async arrow functions (#6721)

webapp/.eslintrc.json

@@ -258,7 +258,7 @@
         "sort-imports": 0,
         "sort-keys": 0,
         "space-before-blocks": [2, "always"],
-        "space-before-function-paren": [2, "never"],
+        "space-before-function-paren": [2, {"anonymous": "never", "named": "never", "asyncArrow": "always"}],
         "space-in-parens": [2, "never"],
         "space-infix-ops": 2,
         "space-unary-ops": [2, { "words": true, "nonwords": false }],