Add testing to vcf-to-varda

test/config/config-GIAB-chrM.json

@@ -5,5 +5,9 @@
       "gvcf": "test/data/16699289_chrM.g.vcf",
       "vcf": "test/data/16699289_chrM.vcf"
     }
+  },
+  "settings": {
+    "threshold": 10,
+    "distance": 0
   }
 }