MNT: Set fallback version to 5.0.0.dev0

Author: effigies

nibabel/info.py

@@ -10,8 +10,8 @@
 # This is a fall-back for versioneer when installing from a git archive.
 # This should be set to the intended next version + dev to indicate a
 # development (pre-release) version.
-_version_major = 4
-_version_minor = 1
+_version_major = 5
+_version_minor = 0
 _version_micro = 0
 _version_extra = '.dev0'