Revert "Reduce k-mer size for Haploflow"

This reverts commit 4077ca3.

Author: Donaim

micall/core/denovo.py

@@ -59,7 +59,7 @@ def denovo(fastq1_path: Path,
                   'thres': -1,
                   'strict': 5,
                   'error': 0.02,
-                  'kmer': 23,
+                  'kmer': 41,
                   'merge': False,
                   'scaffold': False,
                   'patch': False,