GA meta ticket

[codebrain]

Tracking desires for GA release:

• Blog post for ECS .NET (to raise awareness + show usage) (in staging)
• Update README.md in root repository as ".NET integrations repository" (look at sourcelink README for inspiration).
• Determine how to handle pre-release package references - Fix pre-release package references #38
• Decide how to publish/version the Elastic.CommonSchemaNEST assembly - not including in GA release
• NLog Formatter - moving to an issue ticket and removing from this GA meta ticket
• Reevaluate if we want to release prior versions as GA - opening as new ticket
• Lock versioning to MAJOR.MINOR.0 instead of MAJOR.0.0 in the assembly identity - Lock versioning to MAJOR.MINOR.0 instead of MAJOR.0.0 #34
• Lock versioning to MAJOR.MINOR.0 instead of MAJOR.0.0 in nuget package dependency ranges - Fix pre-release package references #38