Update dependency eslint-plugin-jsx-a11y to v6.3.0

Author: renovate-bot

package.json

@@ -103,7 +103,7 @@
     "eslint-loader": "4.0.2",
     "eslint-plugin-import": "2.21.2",
     "eslint-plugin-jest": "23.13.2",
-    "eslint-plugin-jsx-a11y": "6.2.3",
+    "eslint-plugin-jsx-a11y": "6.3.0",
     "eslint-plugin-prettier": "3.1.4",
     "eslint-plugin-react": "7.20.0",
     "eslint-watch": "6.0.1",