Update a language service test to use .psm1 file

This changes updates the language service command completion tests to use
a file with a .psm1 extension to ensure that this file type works
correctly.

Author: daviwil

test/PowerShellEditorServices.Test.Shared/Completion/CompleteCommandFromModule.cs

@@ -11,7 +11,7 @@ public class CompleteCommandFromModule
         public static readonly ScriptRegion SourceDetails = 
             new ScriptRegion
             {
-                File = @"Completion\CompletionExamples.ps1",
+                File = @"Completion\CompletionExamples.psm1",
                 StartLineNumber = 13,
                 StartColumnNumber = 11
             };

test/PowerShellEditorServices.Test.Shared/Completion/CompleteCommandInFile.cs

@@ -11,7 +11,7 @@ public class CompleteCommandInFile
         public static readonly ScriptRegion SourceDetails = 
             new ScriptRegion
             {
-                File = @"Completion\CompletionExamples.ps1",
+                File = @"Completion\CompletionExamples.psm1",
                 StartLineNumber = 8,
                 StartColumnNumber = 7
             };

test/PowerShellEditorServices.Test.Shared/Completion/CompleteVariableInFile.cs

@@ -11,7 +11,7 @@ public class CompleteVariableInFile
         public static readonly ScriptRegion SourceDetails = 
             new ScriptRegion
             {
-                File = @"Completion\CompletionExamples.ps1",
+                File = @"Completion\CompletionExamples.psm1",
                 StartLineNumber = 10,
                 StartColumnNumber = 9
             };

test/PowerShellEditorServices.Test.Shared/Completion/CompletionExamples.ps1 renamed to test/PowerShellEditorServices.Test.Shared/Completion/CompletionExamples.psm1

@@ -57,7 +57,7 @@
     <Compile Include="SymbolDetails\FindsDetailsForBuiltInCommand.cs" />
   </ItemGroup>
   <ItemGroup>
-    <None Include="Completion\CompletionExamples.ps1">
+    <None Include="Completion\CompletionExamples.psm1">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </None>
     <None Include="Debugging\VariableTest.ps1" />