Use HasFlag

Author: Ja bist du narrisch

doc/ReleaseNotes.md

@@ -6,6 +6,7 @@
 
 #### ColumnProperty
 + Removed `ForeignKey` use method `AddForeignKey(...)` instead.
++ `Unique` is now obsolete because you cannot add a constraint name using it. Removing it by name is therefore impossible without investigation. 
 
 ### Other changes
 Several fixes see PRs

src/Migrator/Framework/ColumnProperty.cs

@@ -37,7 +37,7 @@ public enum ColumnProperty
         Indexed = 1 << 4,
 
         /// <summary>
-        /// Unsigned Column. Not used in SQLite (there is only)
+        /// Unsigned Column. Not used in SQLite there is only on integer data type INTEGER.
         /// </summary>
         Unsigned = 1 << 5,
 

src/Migrator/Framework/ColumnPropertyExtensions.cs

@@ -6,21 +6,21 @@ public static class ColumnPropertyExtensions
 {
     public static bool IsSet(this ColumnProperty columnProperty, ColumnProperty flags)
     {
-        return flags != ColumnProperty.None && (columnProperty & flags) == flags;
+        return flags != 0 && columnProperty.HasFlag(flags);
     }
 
     public static bool IsNotSet(this ColumnProperty columnProperty, ColumnProperty flags)
     {
-        return (columnProperty & flags) == 0;
+        return flags == 0 || !columnProperty.HasFlag(flags);
     }
 
     public static ColumnProperty Set(this ColumnProperty columnProperty, ColumnProperty flags)
     {
-        return columnProperty | flags;
+        return columnProperty |= flags;
     }
 
     public static ColumnProperty Clear(this ColumnProperty columnProperty, ColumnProperty flags)
     {
-        return columnProperty & (~flags);
+        return columnProperty &= ~flags;
     }
 }