Nuget bumps, fix IDE warnings and messages, nullable properties

[emanuelgaspar]

Nuget bumps
Fix IDE warnings and messages
Nullable properties

Fix issue found in marketdata-collector:

 at Trakx.CryptoCompare.ApiClient.Websocket.CryptoCompareWebsocketHandler.DeserializeClientSocketIncoming(String topic, IncomingMessage m)
   at System.Text.Json.JsonSerializer.Deserialize(String json, Type returnType, JsonSerializerOptions options)
   ...
System.TypeLoadException: Could not load type 'Trakx.Common.Serialization.Converters.ULongOrStringConverter' from assembly 'Trakx.Common, Version=0.2.2.0, Culture=neutral, PublicKeyToken=null'.

[codacy-production]

Coverage summary from Codacy

See diff coverage on Codacy

Coverage variation	Diff coverage
-0.77%	37.23%

Coverage variation details

	Coverable lines	Covered lines	Coverage
Common ancestor commit (7cb9abc)	1765	1060	60.06%
Head commit (41af74a)	1766 (+1)	1047 (-13)	59.29% (-0.77%)

Coverage variation is the difference between the coverage for the head and common ancestor commits of the pull request branch: <coverage of head commit> - <coverage of common ancestor commit>

Diff coverage details

	Coverable lines	Covered lines	Diff coverage
Pull request (#96)	137	51	37.23%

Diff coverage is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: <covered lines added or modified>/<coverable lines added or modified> * 100%

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[monsieurleberre]

thanks