Support gz-cmake without major version (#161)

Signed-off-by: Steve Peters <scpeters@openrobotics.org>

Author: scpeters

CMakeLists.txt

@@ -12,9 +12,9 @@ find_package(gz-cmake3 QUIET)
 if (NOT ${gz-cmake3_FOUND})
   find_package(gz-cmake4 QUIET)
   if (NOT ${gz-cmake4_FOUND})
-    find_package(gz-cmake5 QUIET)
-    if (NOT ${gz-cmake5_FOUND})
-      message(FATAL_ERROR "Could not find gz-cmake3, gz-cmake4, or gz-cmake5")
+    find_package(gz-cmake QUIET)
+    if (NOT ${gz-cmake_FOUND})
+      message(FATAL_ERROR "Could not find gz-cmake3, gz-cmake4, or gz-cmake")
     endif()
   endif()
 endif()

colcon.pkg

@@ -4,7 +4,7 @@
 #   - https://colcon.readthedocs.io/en/released/user/configuration.html#colcon-pkg-files
 
 {
-  # explicitly add gz-cmake4 and gz-cmake5 as dependencies since they are not included in the package.xml
+  # explicitly add gz-cmake4 and gz-cmake as dependencies since they are not included in the package.xml
   # see https://github.com/gazebosim/gz-tools/pull/142 for discussion of alternatives
-  "dependencies": ["gz-cmake4", "gz-cmake5"],
+  "dependencies": ["gz-cmake4", "gz-cmake"],
 }