Update eslint to version 7.26.0

Author: depfu[bot]

package-lock.json

@@ -50,7 +50,7 @@
     "babel-jest": "^26.6.3",
     "clean-css": "^5.1.2",
     "cross-env": "^7.0.3",
-    "eslint": "^7.25.0",
+    "eslint": "^7.26.0",
     "eslint-config-prettier": "^8.3.0",
     "eslint-plugin-prettier": "^3.4.0",
     "jest": "^26.6.3",