Prepare for CWL v1.3

This commit generates a `cwl_v1_3` parser with Schema SALAD, updates the
utility functions to correctly handle the new version, and adds some
tests to confirm that the new codes behaves correctly.

Author: GlassOfWhiskey

README.rst

@@ -15,8 +15,10 @@ Python Utilities and Autogenerated Classes for loading and parsing `CWL
 v1.0 <https://github.com/common-workflow-language/cwl-utils/blob/main/cwl_utils/parser/v1_0.py>`__,
 `CWL
 v1.1 <https://github.com/common-workflow-language/cwl-utils/blob/main/cwl_utils/parser/v1_1.py>`__,
+`CWL
+v1.2 <https://github.com/common-workflow-language/cwl-utils/blob/main/cwl_utils/parser/v1_2.py>`__,
 and `CWL
-v1.2 <https://github.com/common-workflow-language/cwl-utils/blob/main/cwl_utils/parser/v1_2.py>`__
+v1.3 <https://github.com/common-workflow-language/cwl-utils/blob/main/cwl_utils/parser/v1_3.py>`__,
 documents.
 
 Requires Python 3.8+
@@ -168,6 +170,9 @@ To regenerate install the ``schema_salad`` package and run:
 ``cwl_utils/parser/cwl_v1_2.py`` was created via
 ``schema-salad-tool --codegen python https://github.com/common-workflow-language/cwl-v1.2/raw/codegen/extensions.yml --codegen-parser-info "org.w3id.cwl.v1_2" > cwl_utils/parser/cwl_v1_2.py``
 
+``cwl_utils/parser/cwl_v1_3.py`` was created via
+``schema-salad-tool --codegen python https://github.com/common-workflow-language/cwl-v1.3/raw/main/CommonWorkflowLanguage.yml --codegen-parser-info "org.w3id.cwl.v1_3" > cwl_utils/parser/cwl_v1_3.py``
+
 Release
 ~~~~~~~