feat!: drop eslint v5

BREAKING CHANGE: dropping eslint v5,eslint v6 only supporting

Author: sakit0

package.json

@@ -36,7 +36,7 @@
     "typescript": "^3.5.3"
   },
   "peerDependencies": {
-    "eslint": "^5.3.0 || ^6.0.0",
+    "eslint": "^6.0.0",
     "typescript": "^3.3.3333"
   },
   "dependencies": {