Bump eslint from 3.19.0 to 4.18.2 (#24)

Bumps [eslint](https://github.com/eslint/eslint) from 3.19.0 to 4.18.2.
- [Release notes](https://github.com/eslint/eslint/releases)
- [Changelog](https://github.com/eslint/eslint/blob/master/CHANGELOG.md)
- [Commits](eslint/eslint@v3.19.0...v4.18.2)

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

package.json

@@ -24,7 +24,7 @@
     "babel-runtime": "^6.26.0",
     "babel-tape-runner": "^2.0.1",
     "enzyme": "^2.9.1",
-    "eslint": "^3.19.0",
+    "eslint": "^4.18.2",
     "eslint-config-airbnb": "^14.1.0",
     "eslint-plugin-import": "^2.14.0",
     "eslint-plugin-jsx-a11y": "^4.0.0",