Bump version to 18.0.0

Co-Authored-By: Shane McDonald <me@shanemcd.com>
Co-Authored-By: AlanCoding <arominge@redhat.com>
Co-Authored-By: Rebeccah Hunter <rhunter@redhat.com>
Co-Authored-By: Graham Mainwaring <graham@mhn.org>
Co-Authored-By: Jeff Bradberry <jeff.bradberry@gmail.com>
Co-Authored-By: beeankha <beeankha@gmail.com>
Co-Authored-By: Elyézer Rezende <elyezermr@gmail.com>
Co-Authored-By: Yanis Guenane <yguenane@redhat.com>
Co-Authored-By: Jim Ladd <jladd@redhat.com>
Co-Authored-By: Seth Foster <fosterbseth@gmail.com>
Co-Authored-By: Elijah DeLee <kdelee@redhat.com>
Co-Authored-By: Tiago Góes <tiago.goes2009@gmail.com>
Co-Authored-By: Yago Marques <yagomarquesja@gmail.com>
Co-Authored-By: shebangbash <ndasilva@redhat.com>
Co-Authored-By: Jake McDermott <jmcdermott@ansible.com>
Co-Authored-By: Christian Adams <rooftopcellist@gmail.com>
Co-Authored-By: nixocio <nixocio@gmail.com>
Co-Authored-By: Caleb Boylan <calebboylan@gmail.com>

awxkit/VERSION

@@ -1 +1 @@
-17.0.1
+18.0.0