Update System.Drawing.Common to 4.5.1, 4.7.2

---
updated-dependencies:
- dependency-name: System.Drawing.Common
  dependency-version: 4.7.2
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

explore/2019-08-09.simple-bot-framework/dotnet-windows-bot-interface/dotnet-windows-bot-interface.csproj

@@ -8,7 +8,7 @@
 
   <ItemGroup>
     <PackageReference Include="InputSimulator" Version="1.0.4" />
-    <PackageReference Include="System.Drawing.Common" Version="4.5.1" />
+    <PackageReference Include="System.Drawing.Common" Version="4.7.2" />
   </ItemGroup>
 
 </Project>