Update version number and release notes

Author: peetw

NHibernate.Spatial.props

@@ -2,11 +2,11 @@
   <PropertyGroup>
     <!-- Specify version info -->
     <!-- https://andrewlock.net/version-vs-versionsuffix-vs-packageversion-what-do-they-all-mean/ -->
-    <VersionMajor Condition="'$(VersionMajor)' == ''">5</VersionMajor>
-    <VersionMinor Condition="'$(VersionMinor)' == ''">3</VersionMinor>
+    <VersionMajor Condition="'$(VersionMajor)' == ''">6</VersionMajor>
+    <VersionMinor Condition="'$(VersionMinor)' == ''">0</VersionMinor>
     <VersionPatch Condition="'$(VersionPatch)' == ''">0</VersionPatch>
     <!-- NOTE: Set to "preXYZ" for pre-releases and leave blank for full releases -->
-    <VersionSuffix Condition="'$(VersionSuffix)' == ''"></VersionSuffix>
+    <VersionSuffix Condition="'$(VersionSuffix)' == ''">pre001</VersionSuffix>
 
     <!-- NOTE: Generally shouldn't need to edit anything below this line -->
     <VersionPrefix>$(VersionMajor).$(VersionMinor).$(VersionPatch)</VersionPrefix>

releasenotes.txt

@@ -13,6 +13,15 @@ https://nhibernate.jira.com/projects/NHSP
 ...and support questions to NH Users mailing list:
 http://groups.google.com/group/nhusers
 
+Build 6.0.0-pre001
+========================
+Update NetTopologySuite to 2.0
+Enable SourceLink for NHibernate.Spatial NuGet packages
+
+Update NHibernate to 5.2.7
+Update System.Data.SqlClient to 4.8.1
+Update MySql.Data to 8.0.20
+
 Build 5.3.0
 ========================
 Update MsSql dialect to target .NET Standard 2.0