Embed untracked sources in symbols package.

Author: sharpjs

CHANGES.md

@@ -12,6 +12,7 @@ Most lines should begin with one of these words:
 ## [1.0.3](https://github.com/sharpjs/Prequel/compare/release/1.0.2..release/1.0.3)
 - Fix packaging issues:
   - Enable deterministic build.
+  - Embed untracked sources in symbols package.
 
 ## [1.0.2](https://github.com/sharpjs/Prequel/compare/release/1.0.1..release/1.0.2)
 - Fix incorrect result or index-out-of-range exception when multiple variable 

Directory.Build.props

@@ -53,6 +53,7 @@
   <PropertyGroup>
     <GeneratePackageOnBuild Condition="'$(Configuration)' == 'Release'">true</GeneratePackageOnBuild>
     <PackageOutputPath>..\dist\</PackageOutputPath>
+    <EmbedUntrackedSources>true</EmbedUntrackedSources>
     <IncludeSymbols>true</IncludeSymbols>
     <SymbolPackageFormat>snupkg</SymbolPackageFormat>
   </PropertyGroup>