Updated dependencies and now compatible from netstandard2.0 to net8.0 (#166)

I've updated all dependencies and reverded the base target from netstandard2.1 (introduced in ver 1.2.7) to netstandard2.0 as this keeps it compatible with the widely used Net Framework 4.8.
Added net4.8 to tests and adapted appsettings.json code to work on every platform.
All tests passed on all targets.

Author: energywave

GoogleMapsApi.Test/GoogleMapsApi.Test.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-	<TargetFrameworks>net8.0;net6.0</TargetFrameworks>
+	<TargetFrameworks>net8.0;net6.0;net4.8</TargetFrameworks>
     <LangVersion>latest</LangVersion>
     <OutputType>Library</OutputType>
     <IsPackable>false</IsPackable>
@@ -9,12 +9,18 @@
   </PropertyGroup>
 
   <ItemGroup>
-	<FrameworkReference Include="Microsoft.AspNetCore.App" />
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.8.0" />
-    <PackageReference Include="NUnit" Version="4.0.1" />
-    <PackageReference Include="NUnit3TestAdapter" Version="4.5.0" />
-    <PackageReference Include="NUnit.Analyzers" Version="3.10.0" />
-    <PackageReference Include="coverlet.collector" Version="6.0.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.11.1" />
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
+    <PackageReference Include="NUnit" Version="4.2.2" />
+    <PackageReference Include="NUnit3TestAdapter" Version="4.6.0" />
+    <PackageReference Include="NUnit.Analyzers" Version="4.3.0">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+    </PackageReference>
+    <PackageReference Include="coverlet.collector" Version="6.0.2">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+    </PackageReference>
   </ItemGroup>
 
 	<ItemGroup>

GoogleMapsApi.Test/IntegrationTests/BaseTestIntegration.cs

@@ -1,4 +1,4 @@
-using Microsoft.Extensions.Configuration;
+using GoogleMapsApi.Test.Utils;
 using System.IO;
 
 namespace GoogleMapsApi.Test.IntegrationTests
@@ -12,24 +12,12 @@ namespace GoogleMapsApi.Test.IntegrationTests
     public class BaseTestIntegration
     {
         const string ApiKeyEnvironmentVariable = "GOOGLE_API_KEY";
-        private readonly IConfigurationRoot Configuration;
 
         public BaseTestIntegration()
         {
-            var builder = new ConfigurationBuilder()
-                .SetBasePath(Directory.GetCurrentDirectory())
-                .AddEnvironmentVariables();
-
-            string appsettingsPath = Path.Combine(Directory.GetCurrentDirectory(), "appsettings.json");
-            if (File.Exists(appsettingsPath))
-            {
-                builder.AddJsonFile("appsettings.json", optional: true, reloadOnChange: true);
-            }
-
-            Configuration = builder.Build();
         }
 
-        protected string ApiKey => Configuration.GetValue<string>(ApiKeyEnvironmentVariable) 
+        protected string ApiKey => AppSettings.Load()?.GoogleApiKey
             ?? Environment.GetEnvironmentVariable(ApiKeyEnvironmentVariable) 
             ?? throw new InvalidOperationException($"API key is not configured. Please set the {ApiKeyEnvironmentVariable} environment variable.");
     }

GoogleMapsApi.Test/IntegrationTests/DistanceMatrixTests.cs

@@ -195,9 +195,7 @@ public async Task ShouldReplaceUriViaOnUriCreated()
 
             static Uri onUriCreated(Uri uri)
             {
-                var builder = new UriBuilder(uri);
-                builder.Query = builder.Query.Replace("placeholder", "1,2");
-                return builder.Uri;
+                return new Uri(uri.ToString().Replace("placeholder", "1,2"));
             }
 
             GoogleMaps.DistanceMatrix.OnUriCreated += onUriCreated;

GoogleMapsApi.Test/Utils/AppSettings.cs

@@ -0,0 +1,22 @@
+using Newtonsoft.Json;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace GoogleMapsApi.Test.Utils
+{
+    internal class AppSettings
+    {
+        [JsonProperty(PropertyName ="GOOGLE_API_KEY")]
+        public string? GoogleApiKey { get; set; }
+
+        public static AppSettings? Load()
+        {
+            var path = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "appsettings.json");
+            if (!File.Exists(path)) return null;
+            return JsonConvert.DeserializeObject<AppSettings>(File.ReadAllText(path));
+        }
+    }
+}

GoogleMapsApi/GoogleMapsApi.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-	<TargetFrameworks>net8.0;net7.0;net6.0;netstandard2.1</TargetFrameworks>
+	<TargetFrameworks>net8.0;net7.0;net6.0;netstandard2.0</TargetFrameworks>
 	<LangVersion>latest</LangVersion>
 	<Version>0.0.0</Version>
 	<AppxAutoIncrementPackageRevision>True</AppxAutoIncrementPackageRevision>