chore: Update to @kevinoid/eslint-config@^15.0.0

Signed-off-by: Kevin Locke <kevin@kevinlocke.name>

Author: kevinoid

package.json

@@ -55,7 +55,7 @@
     "yargs": "^16.0.3"
   },
   "devDependencies": {
-    "@kevinoid/eslint-config": "^14.0.0",
+    "@kevinoid/eslint-config": "^15.0.0",
     "codecov": "^3.0.0",
     "coveralls": "^3.0.0",
     "eslint": "^7.3.0",
@@ -64,7 +64,7 @@
     "eslint-plugin-jsdoc": "^31.0.7",
     "eslint-plugin-node": "^11.0.0",
     "eslint-plugin-promise": "^4.2.1",
-    "eslint-plugin-unicorn": "^27.0.0",
+    "eslint-plugin-unicorn": "^28.0.0",
     "jsdoc": "^3.6.0",
     "mocha": "^8.0.1",
     "nodecat": "^2.0.0",