Schema-salad

What's Changed
* pycodegen: collapse unions of identical types & format with black by mr-c in https://github.com/common-workflow-language/schema_salad/pull/443
* document the need for lockfile by mr-c in https://github.com/common-workflow-language/schema_salad/pull/444
* Test with Python 3.10 by mr-c in https://github.com/common-workflow-language/schema_salad/pull/445
* build binary wheels for Python 3.10 by mr-c in https://github.com/common-workflow-language/schema_salad/pull/446
* release-test: fixes for Python 3.10 compat by mr-c in https://github.com/common-workflow-language/schema_salad/pull/447
* use types from Black directly by mr-c in https://github.com/common-workflow-language/schema_salad/pull/448

**Full Changelog**: https://github.com/common-workflow-language/schema_salad/compare/8.2.20210918131710...8.2.20211014150008

USE_MYPYC: verbose 776fdb4 mr-c

pycodegen: return a plain dictionary from save() 54458a4 mr-c

improve support for rdflib > 5 3aa5aa1 mr-c

resolver: inject fewer IDs (430) a6e2c34 mr-c

codegen: place 'class' field early 8cbc01c mr-c

pycodgen
fix loading of long form secondaryfiles (427) b2abeb5 mr-c
deal with anonymous types better (428) 5c86585 mr-c

javacodegen
singular secondaryFiles long form entry (431) 87394ba mr-c
better baseURIs 2c81f4e mr-c
improve the Validator CLI d9ef0e mr-c
tidy up pom.xml with xmllint --format 8c63791 mr-c

document exception sources better f1f465c mr-c

Update rdflib-jsonld requirement from <0.6.0,>=0.4.0 to >=0.4.0,<0.7.0 dependabot 3ed19d6

Add linux aarch64 wheel build support (420) 5569e28 odidev mr-c
Build mypyc-enable Alpine linux docker container & publish it 07aab3a 2452fc2 9fa9171 odidev mr-c

Java codegen: cope with anonymous types a9f213c mr-c

JSON dumping: cope with datetimes when dumping c1a1fc8 49d107b mr-c
YAML loading: avoid datetime objects e2479c4 mr-c

serialize RDF graphs more directly
dump json directly to stdout
upgrade to Python 3.6+ syntax
012c5a7

This release is courtesy of nsoranzo!

Allow any value for dicts contained in j 98e5736
Add missing options to schema-salad-tool 037c6b4
Allow jsonldPredicate to be a str 3c3d6e0