feat: Support ESLint 7.x

BREAKING CHANGE: Requires Node@^10.12.x || 12.x
BREAKING CHANGE: Requires ESLint@^7.x

Author: MichaelDeBoey

.travis.yml

@@ -1,7 +1,7 @@
 language: node_js
 node_js:
-  - '6'
-  - '8'
-  - '9'
-  - '10'
-  - '11'
+  - 10.12
+  - 10
+  - 12.0
+  - 12
+  - 14

package.json

@@ -34,19 +34,19 @@
     "chai": "^4.1.0",
     "dirty-chai": "^2.0.1",
     "escope": "^3.6.0",
-    "eslint": "^7.0.0-alpha.3",
+    "eslint": "^7.9.0",
     "eslint-config-not-an-aardvark": "^2.1.0",
     "eslint-plugin-node": "^11.1.0",
-    "eslint-plugin-self": "^1.0.1",
-    "espree": "^6.2.1",
+    "eslint-plugin-self": "^1.2.1",
+    "espree": "^7.3.0",
     "estraverse": "^5.0.0",
     "lodash": "^4.17.2",
     "mocha": "^7.1.1"
   },
   "peerDependencies": {
-    "eslint": ">=5.0.0"
+    "eslint": "^7.0.0"
   },
   "engines": {
-    "node": "^6.14.0 || ^8.10.0 || >=9.10.0"
+    "node": "^10.12.0 || >=12.0.0"
   }
 }