Bump JetBrains.Annotations from 2019.1.3 to 2020.1.0

Bumps JetBrains.Annotations from 2019.1.3 to 2020.1.0.

Signed-off-by: dependabot-preview[bot] <[email protected]>

Author: dependabot-preview[bot]

src/Directory.Build.props

@@ -19,7 +19,7 @@
     <PropertyGroup>
         <PackageVersion_LibGit2Sharp>0.26.2</PackageVersion_LibGit2Sharp>
         <PackageVersion_LibGit2Sharp_NativeBinaries>2.0.306</PackageVersion_LibGit2Sharp_NativeBinaries>
-        <PackageVersion_JetBrainsAnnotations>2019.1.3</PackageVersion_JetBrainsAnnotations>
+        <PackageVersion_JetBrainsAnnotations>2020.1.0</PackageVersion_JetBrainsAnnotations>
         <PackageVersion_YamlDotNet>8.1.0</PackageVersion_YamlDotNet>
         <PackageVersion_NewtonsoftJson>12.0.3</PackageVersion_NewtonsoftJson>
         <PackageVersion_MicrosoftExtensions>3.0.0</PackageVersion_MicrosoftExtensions>