Add tests for types with no suffix

Closes #2661

Author: sharwell

StyleCop.Analyzers/StyleCop.Analyzers.Test/ReadabilityRules/SA1139UnitTests.cs

@@ -183,6 +183,9 @@ public void Method()
         [InlineData("(bool)true")]
         [InlineData("(bool)(false)")]
         [InlineData("(long)~+1")]
+        [InlineData("unchecked((byte)-1)")]
+        [InlineData("(sbyte)-1")]
+        [InlineData("(int)-1")]
         public async Task TestOtherTypesOfCastsShouldNotTriggerDiagnosticAsync(string correctCastExpression)
         {
             var testCode = $@"