chore: Bump to ESLint 8 (which should remove need to reapply promise plugin)

Author: brettz9

.travis.yml

@@ -13,7 +13,7 @@ before_install:
 install:
   - echo "Avoid Travis's npm auto-install"
 before_script: >
-  npm install --legacy-peer-deps --no-save "eslint@${ESLINT}" eslint-plugin-promise
+  npm install --legacy-peer-deps --no-save "eslint@${ESLINT}"
 notifications:
   email: false
 script:

package.json

@@ -31,7 +31,7 @@
     "babel-plugin-istanbul": "^6.1.1",
     "chai": "^4.3.4",
     "cross-env": "^7.0.3",
-    "eslint": "^8.0.1",
+    "eslint": "^8.1.0",
     "eslint-config-canonical": "^30.1.0",
     "gitdown": "^3.1.4",
     "glob": "^7.2.0",