requirements: update 'twine'

(plus some dependencies)

Changelog:
- 1.13.0 (2019-02-13)
  https://github.com/pypa/twine/blob/1.13.0/docs/changelog.rst#id1

Code diff:
pypa/twine@1.12.1...1.13.0

Author: glarrain

requirements/release.txt

@@ -5,24 +5,19 @@
 # Required packages:
 bumpversion==0.5.3
 setuptools==40.8.0
-twine==1.12.1
+twine==1.13.0
 wheel==0.33.1
 
 # Packages dependencies:
 #   - twine:
 #       - pkginfo
 #       - readme-renderer
-#           - bleach
-#               - webencodings
-#           - docutils
-#           - Pygments
-#           - six
 #       - requests
 #       - requests-toolbelt
 #       - setuptools
 #       - tqdm
 pkginfo==1.5.0.1
 readme-renderer==24.0
 requests==2.21.0
-requests-toolbelt==0.8.0
-tqdm==4.29.1
+requests-toolbelt==0.9.1
+tqdm==4.31.1