New nextflow_schema.json validation issues with nf-validation

[fbdtemme]

The upcoming meta schema in nf-validation raises some issues:

Schema validation errors were encountered.
  pixelator_schema.json::$.definitions.adapterqc_options: 'type' is a required property
  pixelator_schema.json::$.definitions.adapterqc_options.properties.adapterqc_mismatches.maximum: 0.9 is not of type 'integer'
  pixelator_schema.json::$.definitions.demux_options: 'type' is a required property
  pixelator_schema.json::$.definitions.demux_options.properties.demux_mismatches.maximum: 0.9 is not of type 'integer'
  pixelator_schema.json::$.definitions.collapse_options: 'type' is a required property
  pixelator_schema.json::$.definitions.graph_options: 'type' is a required property
  pixelator_schema.json::$.definitions.annotate_options: 'type' is a required property
  pixelator_schema.json::$.definitions.analysis_options: 'type' is a required property
  pixelator_schema.json::$.definitions.report_options: 'type' is a required property
  pixelator_schema.json::$.definitions.global_config_options.properties.pixelator_container.format: 'url' is not one of ['file-path', 'directory-path', 'path']

See: nextflow-io/nf-validation#133