SEQ: fix event type and implement properties

[gahujipo]

• fixed event type. Previous: Now:

• Write default "properties" in logging target to event log too

  Add-LoggingTarget -Name Seq -Configuration @{
  Url         = "https://xxx.x.net"          # <Required> Url to Seq instance
  ApiKey      = "xxx"          # <Not required> Api Key to authenticate to Seq
  Properties  = @{
      "TestProperty" = "test_value"
      "TestProperty2" = "test_value2"
  }          # <Required> Hashtable of user defined properties to be added to each Seq message
  }

PR made against master, because dev is quite a few commits behind of master. Let me know if you want the PR in a different way.

[gahujipo]

@EsOsO is there something else you need to be able to merge this?

[EsOsO]

sorry for the delay