update travis build configuration

Author: tranpl

.travis.yml

@@ -1,6 +1,6 @@
 language: csharp
 mono: none
-dotnet: 2.1.810
+dotnet: 5.0.2
 script:
   - dotnet restore
   - dotnet build ./RedcapApi/

RedcapApi/Redcap.csproj

@@ -20,8 +20,8 @@
 -DeleteDagsAsync
 -ExportUserDagAssignmentAsync
 -ImportUserDagAssignmentAsync
-Minor bugs fixes to existing APIs regarding optional parameters.
-Version bump</PackageReleaseNotes>
+-Added models to support new APIs
+Minor bugs fixes to existing APIs regarding optional parameters.</PackageReleaseNotes>
     <PackageRequireLicenseAcceptance>false</PackageRequireLicenseAcceptance>
     <ApplicationIcon />
     <OutputType>Library</OutputType>