fix and add tests for community algos

Author: brs96

CHANGELOG.md

@@ -2,12 +2,11 @@
 
 ### New Features
 1. Project all (non-string) node properties using the appropriate (integer/float) types.
-2. Support personalisation, post-filtering and node name mapping in centrality algorithms whenever appropriate.
+2. Support personalisation, post-filtering and node name mapping in centrality and community algorithms whenever appropriate.
 3. Support post-filtering and node name mapping in community algorithms whenever appropriate.
 
 ### Bug Fixes
-1. Fix GDS calls for path algorithms and clean up returned data format.
-2. Fix wrong GDS call for K-Core Decomposition, K-1 Coloring.
+1. Fix GDS calls for path and community algorithms and clean up returned data format.
 
 ### Other Changes
 1. Removed minimum_weight_k_spanning_tree since it is write mode only, which may modify the database unexpectedly.