updated dependencies after finding that six <1.7.x does not work; also, all versions of python3 require singledispatch currently

- PKGBUILD still works
 - .deb builds/installs/works; tested building for debian/testing as well, and that works too

arch/PKGBUILD

@@ -33,7 +33,7 @@ build() {
 }
 
 package_python-pgpy() {
-    depends=('python-cryptography>=0.6' 'python-cryptography<0.6.1' 'python-singledispatch' 'python-six')
+    depends=('python-cryptography>=0.5.2' 'python-cryptography<=0.6' 'python-singledispatch' 'python-six>=1.7.2')
 
     cd PGPy-${pkgver}
     python3 setup.py install --root="${pkgdir}" --optimize=1 --skip-build
@@ -41,8 +41,8 @@ package_python-pgpy() {
 }
 
 package_python2-pgpy() {
-    depends=('python2-cryptography>=0.6' 'python2-cryptography<0.6.1' 
-             'python2-six' 'python2-enum34' 'python-singledispatch')
+    depends=('python2-cryptography>=0.5.2' 'python2-cryptography<=0.6' 
+             'python2-six>=1.7.2' 'python2-enum34' 'python-singledispatch')
 
     cd PGPy-${pkgver}-python2
     python2 setup.py install --root="${pkgdir}" --optimize=1 --skip-build

debian/python-pgpy.pydist

@@ -1,4 +1,4 @@
 enum34 python-enum34
 singledispatch python-singledispatch
-six python-six
-cryptography python-cryptography (>= 0.5.4), python-cryptography (<= 0.6.0)
+six python-six (>= 1.7.2)
+cryptography python-cryptography (>= 0.5.2), python-cryptography (<= 0.6.0)

debian/python3-pgpy.pydist

@@ -1,4 +1,4 @@
 enum34 -3.4 python3-enum34
-singledispatch -3.4 python3-singledispatch
-six python3-six
-cryptography python3-cryptography (>= 0.5.4), python3-cryptography (<= 0.6.0)
+singledispatch python3-singledispatch
+six python3-six (>= 1.7.2)
+cryptography python3-cryptography (>= 0.5.2), python3-cryptography (<= 0.6.0)