Update puppetlabs/reboot dependency

As per issue #9, the version of '0.9.1' for the dependency of the
`puppetlabs/reboot` module is incorrect. This was never a release and is
suspected to have originally been a typo. In addition, since the last
release of this module, much newer and stable releases of the
`puppetlabs/reboot` dependency have been made available.

This commit updates the dependency to require at least version 1.0.0 of
the `puppetlabs/reboot` module.

metadata.json

@@ -16,6 +16,6 @@
   "dependencies": [
     { "name": "puppetlabs/powershell", "version_requirement": ">= 1.0.1" },
     { "name": "puppetlabs/stdlib", "version_requirement": ">= 4.1.0" },
-    { "name": "puppetlabs/reboot", "version_requirement": ">= 0.9.1" }
+    { "name": "puppetlabs/reboot", "version_requirement": ">= 1.0.0" }
   ]
 }