chore: update of csvhelper to v18 (#148)

Author: flq

CHANGELOG.md

@@ -5,6 +5,7 @@
 
 ### Dependencies
 1. [#145](https://github.com/influxdata/influxdb-client-csharp/pull/145): Updated RestSharp to 106.11.7
+1. [#148](https://github.com/influxdata/influxdb-client-csharp/pull/148): Updated CsvHelper to 18.0.0
 
 ### CI
 1. [#140](https://github.com/influxdata/influxdb-client-csharp/pull/140): Updated default docker image to v2.0.3

Client.Core/Client.Core.csproj

@@ -32,7 +32,7 @@
     </ItemGroup>
 
     <ItemGroup>
-      <PackageReference Include="CsvHelper" Version="[15.0.4,16.0)" />
+      <PackageReference Include="CsvHelper" Version="18.0.0" />
       <PackageReference Include="Newtonsoft.Json" Version="	11.0.2" />
       <PackageReference Include="NodaTime" Version="2.4.1" />
       <PackageReference Include="NodaTime.Serialization.JsonNet" Version="2.0.0" />