Update to 2.20.1 and fix last version detection

WAPT/control

@@ -1,5 +1,5 @@
 package           : fws-git
-version           : 2.20.0-3
+version           : 2.20.1-1
 architecture      : all
 section           : base
 priority          : optional

setup.py

@@ -16,11 +16,13 @@ def install():
     )
 
 def update_package():
+    import re
     print('Updating Git Package')
     latest = json.loads(requests.get('https://api.github.com/repos/git-for-windows/git/releases/latest').text.encode('utf-8'))
-    version = latest['tag_name'].lstrip('v').rstrip('.windows.1')
+    version = re.search('v(.*)\.windows\.1', latest['tag_name']).group(1)
     pe = PackageEntry();
     control = pe.load_control_from_wapt('.')
+    print('Last version is %s' % version)
     for arch in ['32','64']:
         for asset in latest['assets']:
             if asset['name'] == 'Git-%s-%s-bit.exe' %(version,arch) and not isfile('Git-%s-%s-bit.exe' % (version,arch)):
@@ -30,6 +32,7 @@ def update_package():
         for old in glob.glob(r'Git-*-%s-bit.exe' % arch):
             if not old == 'Git-%s-%s-bit.exe' %(version,arch):
                 remove_file(old)
+
     if Version(version) > Version(control['version'].split('-',1)[0]):
         print('Updating control file with new version %s' % version)
         pe.version = version + '-0'