Merge pull request #149 from nicmunroe/release/v0.20.1-bookkeeping

Bump version for snapshot development

Update changelog and version for 0.20.1

Merge pull request #148 from jrduncans/concurrent-request-attributes

Update actions/upload-artifact to v4

Change attributes in RequestInfoImpl to be a ConcurrentHashMap

Merge pull request #147 from nicmunroe/release/v0.20.0-bookkeeping

Bump version for snapshot development

Update changelog and version for 0.20.0

Merge pull request #146 from nicmunroe/feature/dependency-update

Update transitively exported dependency versions

Remove travis CI config

Merge pull request #145 from nicmunroe/release/v0.19.3-bookkeeping

Bump version for snapshot development

Update changelog and version for 0.19.3