chore: update ESLint devDeps (#123)

Author: brettz9

package.json

@@ -19,8 +19,8 @@
     "@babel/register": "^7.0.0",
     "babel-plugin-add-module-exports": "^1.0.0",
     "chai": "^4.2.0",
-    "eslint": "^5.9.0",
-    "eslint-config-canonical": "^14.0.0",
+    "eslint": "^5.10.0",
+    "eslint-config-canonical": "^15.0.0",
     "gitdown": "^2.5.5",
     "glob": "^7.1.3",
     "globby": "^8.0.1",