Update fingerprint.py

Adding back support for circular fingerprint type

Author: Jnelen

PyFingerprint/fingerprint.py

@@ -19,7 +19,7 @@
 
 
 cdktypes = ['standard', 'extended', 'graph', 'maccs', 'pubchem', 'estate', 'hybridization', 'lingo', 
-            'klekota-roth', 'shortestpath', 'signature', 'substructure']
+            'klekota-roth', 'shortestpath', 'signature', 'substructure', 'circular']
 rdktypes = ['rdkit', 'morgan', 'rdk-maccs', 'topological-torsion', 'avalon', 'atom-pair']
 babeltypes = ['fp2', 'fp3', 'fp4']
 vectypes = ['mol2vec', 'heteroencoder']