Update for version 1.8.0 (#6)

- Bump library version
- Bump htmx script version
- Add hx-replace-url / HX-Replace-Url
- Add hx-select-oob
- Change hx-push-url to accept a string
- Add HX-Push-Url, obsolete HX-Push
- Implement HX-Reswap header
- Rework project structure to add common project

src/Common/Giraffe.Htmx.Common.fsproj

@@ -0,0 +1,11 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <GenerateDocumentationFile>true</GenerateDocumentationFile>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <Compile Include="Common.fs" />
+  </ItemGroup>
+
+</Project>