renamed to searchqualifieroperator

make it clearer what this class is, plus updated all relevant project
files.

Octokit/Models/Request/SearchQualifierOperator.cs

@@ -0,0 +1,20 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Octokit
+{
+    /// <summary>
+    /// Used for date and int comparisions in searches
+    /// </summary>
+    public enum SearchQualifierOperator
+    {
+        GreaterThan, // >
+        LessThan, // <
+        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Naming", "CA1702:CompoundWordsShouldBeCasedCorrectly", MessageId = "LessOr")]
+        LessOrEqualTo, // <=
+        GreaterOrEqualTo// >=
+    }
+}