15.0.0

Bump version to 15.0.0 for those who don't use custom `.lints.json`.

Breaking changes (for those who don't use custom `.lints.json`):
- Add [dockerfilelint](https://github.com/replicatedhq/dockerfilelint)

Fixes:
- Add support for YAML in linter configs

Other changes:
- Update dependencies

If you already have a `.lints.json`, in order to use dockerfilelint
you need to add it to your `.lints.json`, as in
[src/default.lints.json](src/default.lints.json).

If you wish to customize dockerfilelint rules you can create a
`.dockerfilelintrc` file in the root of your project (see more
about it at
https://github.com/replicatedhq/dockerfilelint#configuring).

package.json

@@ -1,6 +1,6 @@
 {
     "name": "lints",
-    "version": "14.0.0",
+    "version": "15.0.0",
     "description": "Lint all your JavaScript, CSS, HTML, Markdown and Dockerfiles with a single command",
     "keywords": [
         "lint",