Update dependency eslint-plugin-import to v2.28.0

Author: renovate[bot]

package.json

@@ -23,7 +23,7 @@
     "chai": "4.3.3",
     "eslint": "7.22.0",
     "eslint-config-standard": "16.0.2",
-    "eslint-plugin-import": "2.22.1",
+    "eslint-plugin-import": "2.28.0",
     "eslint-plugin-node": "11.1.0",
     "eslint-plugin-promise": "4.3.1",
     "mocha": "8.3.1",