Revert "Update source-link and add package lock files"

This reverts commit 0478c23.

Thought I'd give NuGet lock file feature a try. Woof -- that didn't work
like at all. Not sure what's wrong but packages on my laptop do not
match with whats on nuget.org

Author: natemcmaster

Directory.Build.props

@@ -11,8 +11,6 @@
     <NeutralLanguage>en-US</NeutralLanguage>
     <PackageRequireLicenseAcceptance>false</PackageRequireLicenseAcceptance>
     <PackageLicenseExpression>Apache-2.0</PackageLicenseExpression>
-    <RestorePackagesWithLockFile>true</RestorePackagesWithLockFile>
-    <RestoreLockedMode Condition="'$(CI)' == 'true'">true</RestoreLockedMode>
     <PackageProjectUrl>https://github.com/natemcmaster/CommandLineUtils</PackageProjectUrl>
     <RepositoryUrl>https://github.com/natemcmaster/CommandLineUtils.git</RepositoryUrl>
     <RepositoryType>git</RepositoryType>

src/CommandLineUtils/packages.lock.json

@@ -5,7 +5,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.0.0-beta2-18618-05" PrivateAssets="All" />
+    <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.0.0-beta-63127-02" PrivateAssets="All" />
   </ItemGroup>
 
   <Import Project="..\Directory.Build.targets" />