Use PackageIcon instead

Merge pull request eventflow#753 from frankebersoll/fix-ef-net31

Entity Framework on .NET Core 3.1

Merge pull request eventflow#749 from eventflow/fix-master

Fix master

Merge pull request eventflow#712 from eventflow/header-correction

Correct license header in accordance with CLA

Update release notes to align with latest PRs merged

Merge pull request eventflow#681 from eventflow/null-single-value-obj…

…ects

Fix: Deserializing "null" into nullable SingleValueObjects

Merge pull request eventflow#657 from frankebersoll/aspnet-core

Fixed issues with ASP.NET metadata providers

Merge pull request eventflow#650 from JackHerring/Rebuild-Async-ReadM…

…odels

Rebuild async ReadModels

Merge pull request eventflow#624 from eventflow/move-tests-to-netcore

WIP: EventFlow.TestHelper to NET Standard

Merge branch 'develop'