feat: Target .NET Framework 4.8 (#510)

Author: Dor-bl

src/Appium.Net/Appium.Net.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>netstandard2.0;net45</TargetFrameworks>
+    <TargetFrameworks>netstandard2.0;net48</TargetFrameworks>
     <PackageLicenseFile>LICENSE.txt</PackageLicenseFile>
     <RootNamespace>OpenQA.Selenium</RootNamespace>
     <Company>Appium Commiters</Company>
@@ -29,7 +29,7 @@
   <PropertyGroup Condition="'$(Configuration)|$(TargetFramework)|$(Platform)'=='Release|netstandard2.0|AnyCPU'">
     <DocumentationFile>Appium.Net.xml</DocumentationFile>
   </PropertyGroup>
-  <PropertyGroup Condition="'$(Configuration)|$(TargetFramework)|$(Platform)'=='Release|net45|AnyCPU'">
+  <PropertyGroup Condition="'$(Configuration)|$(TargetFramework)|$(Platform)'=='Release|net48|AnyCPU'">
     <DocumentationFile>Appium.Net.xml</DocumentationFile>
   </PropertyGroup>
 

test/integration/Appium.Net.Integration.Tests.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>net45</TargetFrameworks>
+    <TargetFrameworks>net48</TargetFrameworks>
   </PropertyGroup>
   <ItemGroup>
     <Compile Remove="apps\**" />