update peachpie to dotnet core 3.1 (#5288)

* peachpie updated, simplified

- aspnetcore 3.0
- peachpie 1.0.0-appv3073
- tests simplified

* update peachpie to dotnet core 3.1

frameworks/PHP/peachpie/Server/Server.csproj

@@ -1,12 +1,12 @@
 <Project Sdk="Microsoft.NET.Sdk.Web">
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp3.0</TargetFramework>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
     <OutputType>Exe</OutputType>
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Peachpie.AspNetCore.Web" Version="1.0.0-appv3073" />
+    <PackageReference Include="Peachpie.AspNetCore.Web" Version="1.0.0-appv3097" />
   </ItemGroup>
 
   <ItemGroup>

frameworks/PHP/peachpie/Website/Website.msbuildproj

@@ -1,4 +1,4 @@
-<Project Sdk="Peachpie.NET.Sdk/1.0.0-appv3073">
+<Project Sdk="Peachpie.NET.Sdk/1.0.0-appv3097">
 
   <PropertyGroup>
     <OutputType>Library</OutputType>

frameworks/PHP/peachpie/peachpie.dockerfile

@@ -1,9 +1,9 @@
-FROM mcr.microsoft.com/dotnet/core/sdk:3.0 AS build
+FROM mcr.microsoft.com/dotnet/core/sdk:3.1 AS build
 WORKDIR /app
 COPY . .
 RUN dotnet publish -c Release -o out Server
 
-FROM mcr.microsoft.com/dotnet/core/aspnet:3.0 AS runtime
+FROM mcr.microsoft.com/dotnet/core/aspnet:3.1 AS runtime
 ENV COMPlus_ReadyToRun 0
 WORKDIR /app
 COPY --from=build /app/out ./