[cryptography] Updated to last available version (2.3.1)

This recipe update cryptography to last version.
Note that "pyasn1" is not anymore a dependency and has been replaced by
"asn1crypto".

Author: goffi-contrib

pythonforandroid/recipes/cryptography/__init__.py

@@ -4,9 +4,9 @@
 
 class CryptographyRecipe(CompiledComponentsPythonRecipe):
     name = 'cryptography'
-    version = '1.3'
+    version = '2.3.1'
     url = 'https://github.com/pyca/cryptography/archive/{version}.tar.gz'
-    depends = [('python2', 'python3crystax'), 'openssl', 'idna', 'pyasn1', 'six', 'setuptools', 'enum34', 'ipaddress', 'cffi']
+    depends = [('python2', 'python3crystax'), 'openssl', 'idna', 'asn1crypto', 'six', 'setuptools', 'enum34', 'ipaddress', 'cffi']
     call_hostpython_via_targetpython = False
 
     def get_recipe_env(self, arch):