Bump eslint from 1.10.3 to 6.6.0

Bumps [eslint](https://github.com/eslint/eslint) from 1.10.3 to 6.6.0.
- [Release notes](https://github.com/eslint/eslint/releases)
- [Changelog](https://github.com/eslint/eslint/blob/master/CHANGELOG.md)
- [Commits](eslint/eslint@v1.10.3...v6.6.0)

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

package.json

@@ -14,7 +14,7 @@
   },
   "devDependencies": {
     "browserify": "^11.0.1",
-    "eslint": "^1.4.0",
+    "eslint": "^6.6.0",
     "proxyquire": "^1.6.0",
     "rebundler": "^0.2.0",
     "tape": "^4.0.1"