Merge pull request #1222 from theupdateframework/dependabot/pip/cffi-1.14.4

build(deps): bump cffi from 1.14.3 to 1.14.4

Author: joshuagl

requirements-pinned.txt

@@ -1,5 +1,5 @@
 certifi==2020.6.20       # via requests
-cffi==1.14.3              # via cryptography, pynacl
+cffi==1.14.4              # via cryptography, pynacl
 chardet==3.0.4            # via requests
 cryptography==3.2.1         # via securesystemslib
 enum34==1.1.6             ; python_version < '3' # via cryptography