Modified the schema and config to include the new flag.

Author: MatthiasZepper

nextflow.config

@@ -26,6 +26,7 @@ params {
 
     // UMI handling
     with_umi                   = false
+    skip_umi_extract           = false
     umitools_extract_method    = 'string'
     umitools_bc_pattern        = null
     umi_discard_read           = null

nextflow_schema.json

@@ -67,6 +67,11 @@
                     "description": "UMI pattern to use. Can be either 'string' (default) or 'regex'.",
                     "help_text": "More details can be found in the [UMI-tools documentation](https://umi-tools.readthedocs.io/en/latest/reference/extract.html#extract-method).\n"
                 },
+                "skip_umi_extract": {
+                    "type": "boolean",
+                    "fa_icon": "fas fa-compress-alt",
+                    "description": "Skip the UMI extraction from the read in case the UMIs have been moved to the headers in advance of the pipeline run."
+                },
                 "umitools_bc_pattern": {
                     "type": "string",
                     "fa_icon": "fas fa-barcode",