Bump up version to 2.1.1-beta2

GlobalStaticVersion.props

@@ -8,7 +8,7 @@
     <SemanticVersionMajor>2</SemanticVersionMajor>
     <SemanticVersionMinor>1</SemanticVersionMinor>
     <SemanticVersionPatch>1</SemanticVersionPatch>
-    <PreReleaseMilestone>beta1</PreReleaseMilestone>
+    <PreReleaseMilestone>beta2</PreReleaseMilestone>
     <!-- 
       Date when Semantic Version was changed. 
       Update for every public release.
@@ -17,7 +17,7 @@
       as it will restart file versions so 2.4.0-beta1 may have higher 
       file version (like 2.4.0.2222) than 2.4.0-beta2 (like 2.4.0.1111)
     -->
-    <SemanticVersionDate>2018-04-09</SemanticVersionDate>
+    <SemanticVersionDate>2018-06-06</SemanticVersionDate>
 
     <PreReleaseVersion Condition="'$(PreReleaseVersion)'==''">$([MSBuild]::Divide($([System.DateTime]::Now.Subtract($([System.DateTime]::Parse($(SemanticVersionDate)))).TotalMinutes), 5).ToString('F0'))</PreReleaseVersion>
   </PropertyGroup>