Update to .NET 5.0.

.idea/.idea.Marechai/.idea/modules.xml

@@ -2,7 +2,7 @@
 <project version="4">
   <component name="ProjectModuleManager">
     <modules>
-      <module fileurl="file://$PROJECT_DIR$/.idea/.idea.Marechai/riderModule.iml" filepath="$PROJECT_DIR$/.idea/.idea.Marechai/riderModule.iml" />
+      <module fileurl="file://$PROJECT_DIR$/.idea/.idea.Marechai/.idea/riderModule.iml" filepath="$PROJECT_DIR$/.idea/.idea.Marechai/.idea/riderModule.iml" />
     </modules>
   </component>
 </project>

Marechai.Database/Marechai.Database.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <TargetFramework>net5.0</TargetFramework>
     <RootNamespace>Marechai.Database</RootNamespace>
   </PropertyGroup>
   <ItemGroup>

Marechai/Marechai.csproj

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Project Sdk="Microsoft.NET.Sdk.Web">
   <PropertyGroup>
-    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <TargetFramework>net5.0</TargetFramework>
     <Version>4.0.0.1836</Version>
     <Company>Canary Islands Computer Museum</Company>
     <Copyright>Copyright © 2003-2020 Natalia Portillo</Copyright>
@@ -28,7 +28,6 @@
     </PackageReference>
     <PackageReference Include="Microsoft.EntityFrameworkCore.Proxies" Version="3.1.6" />
     <PackageReference Include="Microsoft.VisualStudio.Web.CodeGeneration.Design" Version="3.1.4" />
-    <PackageReference Include="MSBump" Version="2.3.2" PrivateAssets="All" />
     <PackageReference Include="MySql.Data" Version="8.0.21" />
     <PackageReference Include="SkiaSharp" Version="2.80.1" />
     <PackageReference Include="SkiaSharp.NativeAssets.Linux" Version="2.80.1" />