Merge branch 'rel/1.4.0' into 'v1.4'

MNT: version

See merge request fsl/fsleyes/fsleyes!317

fsleyes/version.py

@@ -14,7 +14,7 @@ version number. See also the :mod:`fsl.version` module.
 """
 
 
-__version__ = '1.5.0.dev0'
+__version__ = '1.4.0'
 """Current version number, as a string. The FSLeyes version number consists
 of three numbers, separated by a period, which roughly obeys the Semantic
 Versioning conventions (http://semver.org/).