Update project angular.strap to v2.1.5

libgrabber updated project angular.strap to v2.1.5.

@mgcrea

### Metadata information

```json
{
  "metadata": {
    "packageManager": "github",
    "name": "angular.strap",
    "repo": "mgcrea/angular-strap",
    "files": {
      "basePath": "dist/",
      "include": ["*.min.js", "angular-strap.min.js.map", "./modules/*.min.js", "./modules/*.js.map"],
      "exclude": []
    },
    "path": "/home/jsdelivr/files/angular.strap",
    "localVersions": ["2.0.0", "2.0.2", "2.1.1", "2.1.2", "2.1.3", "2.1.4"],
    "remoteVersions": ["v0.5.6", "v0.5.7", "v0.5.8", "v0.5.9", "v0.5.10", "v0.6.0", "v0.6.1", "v0.6.2", "v0.6.3", "v0.6.4", "v0.6.5", "v0.6.6", "v0.7.0", "v0.7.1", "v0.7.2", "v0.7.3", "v0.7.4", "v0.7.5", "v0.7.6", "v0.7.7", "v0.7.8", "v2.0.0-beta.1", "v2.0.0-beta.2", "v2.0.0-beta.3", "v2.0.0-beta.4", "v2.0.0-rc.1", "v2.0.0-rc.2", "v2.0.0-rc.3", "v2.0.0-rc.4", "v2.0.0", "v2.0.1", "v2.0.2", "v2.0.3", "v2.0.4", "v2.0.5", "v2.1.0", "v2.1.1", "v2.1.2", "v2.1.3", "v2.1.4", "v2.1.5"],
    "branchVersions": []
  },
  "version": "v2.1.5",
  "updated": true,
  "updatePath": "/home/jsdelivr/files/angular.strap/2.1.5",
  "branch": "angular.strap/v2.1.5"
}
```