task: add basic build script

Author: alastairtree

appveyor.yml

@@ -0,0 +1,19 @@
+version: 2.0.0.{build}-beta01
+configuration: Release
+assembly_info:
+  patch: true
+  file: '**\AssemblyInfo.*'
+  assembly_version: '{version}'
+  assembly_file_version: '{version}'
+  assembly_informational_version: '{version}'
+dotnet_csproj:
+  patch: true
+  file: '**\*.csproj'
+  version: '{version}'
+  package_version: '{version}'
+  assembly_version: '{version}'
+  file_version: '{version}'
+  informational_version: '{version}'
+build_script:
+- ps: '& .\build.ps1'
+deploy: off

build.ps1

@@ -0,0 +1,2 @@
+dotnet restore
+dotnet build -c Release