version bump to 0.60.dev0 (#661)

Author: akaszynski

ansys/mapdl/core/_version.py

@@ -1,14 +1,14 @@
 """Version of ansys-mapdl-core module.
 
-On the ``master`` branch, use 'dev0' to denote a development version.
+On the ``main`` branch, use 'dev0' to denote a development version.
 For example:
 
 version_info = 0, 58, 'dev0'
 
 """
 
 # major, minor, patch
-version_info = 0, 59, "dev0"
+version_info = 0, 60, "dev0"
 
 # Nice string for the version
 __version__ = ".".join(map(str, version_info))