Merge pull request microsoft#110 from wravery/master

Update to v3.2.3 and keep the version in sync with release tags

Merge pull request microsoft#104 from wravery/master

Sync to latest PEGTL commit and fix breaks

Merge pull request microsoft#99 from wravery/master

Update PEGTL to 83b6cdc717b68a3714e6c76e13dbc4a571b491c1

Merge pull request microsoft#92 from wravery/master

Use explicit DLL exports on Windows

Merge pull request microsoft#91 from wravery/master

Doc updates and a bug fix for defaultValue in Introspection

Merge pull request microsoft#88 from wravery/master

Implement the Validation section of the spec

Merge pull request microsoft#78 from wravery/master

Add more documentation

Merge pull request microsoft#71 from wravery/master

Handle blank lines in the sample app and fix problems with schema_exception

Merge pull request microsoft#64 from wravery/master

Fix microsoft#63 - I re-ran the PR verification build and it [passed](https://dev.azure.com/wravery/Build%20Pipelines/_build/results?buildId=237)

Merge pull request microsoft#60 from wravery/master

Misc. updates to synch with latest PEGTL