Switch to bump2version (because bumpversion seems abandoned)

Author: gonzalocasas

requirements-dev.txt

@@ -1,7 +1,7 @@
 sphinx_compas_theme>=0.4
 sphinx>=1.6
 invoke>=0.14
-bumpversion>=0.5
+bump2version>=0.5.11
 check-manifest>=0.36
 flake8
 autopep8

tasks.py

@@ -210,7 +210,7 @@ def release(ctx, release_type):
     ctx.run('invoke check test')
 
     # Bump version and git tag it
-    ctx.run('bumpversion %s --verbose' % release_type)
+    ctx.run('bump2version %s --verbose' % release_type)
 
     # Build project
     ctx.run('python setup.py clean --all sdist bdist_wheel')