Breaking: drop support for Node < 10

Author: Kai Cataldo

.travis.yml

@@ -1,4 +1,4 @@
 language: node_js
 node_js:
-  - 6
-  - 7
+  - 10
+  - 12

package.json

@@ -21,16 +21,16 @@
   },
   "homepage": "https://github.com/not-an-aardvark/eslint-canary#readme",
   "devDependencies": {
-    "eslint": "^4.19.1",
-    "eslint-config-eslint": "^3.0.0",
-    "npm": "^3.10.10"
+    "eslint": "^6.8.0",
+    "eslint-config-eslint": "^6.0.0",
+    "npm": "^6.13.4"
   },
   "dependencies": {
-    "chai": "^3.5.0",
-    "cross-spawn": "^6.0.5",
-    "js-yaml": "^3.7.0"
+    "chai": "^4.2.0",
+    "cross-spawn": "^7.0.1",
+    "js-yaml": "^3.13.1"
   },
   "engines": {
-    "node": ">=6"
+    "node": ">=10"
   }
 }