Update the release process for community release to include release candidate versioning (#1802)

.bumpversion.cfg

@@ -1,5 +1,19 @@
 [bumpversion]
 current_version = 0.16.0
+commit = True
+# The below regex details an acceptable version number by naming the groups (major, minor, patch, prerel, and
+# prerelversion) and also specifying the valid values for each group (integers, `\d+`,  for major, minor, patch, and
+# prerelversion and only `rc` as the acceptable value for prerel).
+parse = (?P<major>\d+)\.(?P<minor>\d+)\.(?P<patch>\d+)(?:-(?P<prerel>rc)\.(?P<prerelversion>\d+))?
+serialize =
+	{major}.{minor}.{patch}-{prerel}.{prerelversion}
+	{major}.{minor}.{patch}
+
+[bumpversion:part:prerel]
+optional_value = release
+values =
+	rc
+	release
 
 [bumpversion:file:setup.py]
 search = version="{current_version}"