Bump mkdirp from 0.5.1 to 1.0.3

Bumps [mkdirp](https://github.com/isaacs/node-mkdirp) from 0.5.1 to 1.0.3.
- [Release notes](https://github.com/isaacs/node-mkdirp/releases)
- [Changelog](https://github.com/isaacs/node-mkdirp/blob/master/CHANGELOG.md)
- [Commits](https://github.com/isaacs/node-mkdirp/commits/v1.0.3)

Signed-off-by: dependabot-preview[bot] <[email protected]>

Author: dependabot-preview[bot]

package-lock.json

@@ -24,7 +24,7 @@
     "chalk": "3.0.0",
     "generator-jhipster": "6.6.0",
     "lodash": "4.17.15",
-    "mkdirp": "0.5.1",
+    "mkdirp": "1.0.3",
     "pluralize": "8.0.0",
     "yeoman-generator": "4.4.0"
   },