Support StringComparison options for ContainsAny (#514)

Thx for the PR! Somehow missed the notification for this, sorry for the delay.

Author: JDBarndt

src/ServiceStack.Text/StringExtensions.cs

@@ -918,6 +918,15 @@ public static bool ContainsAny(this string text, params string[] testMatches)
             return false;
         }
 
+        public static bool ContainsAny(this string text, StringComparison comparisonType, params string[] testMatches)
+        {
+            foreach (var testMatch in testMatches)
+            {
+                if (text.IndexOf(testMatch, comparisonType) >= 0) return true;
+            }
+            return false;
+        }
+      
         public static bool IsValidVarName(this string name) => InvalidVarCharsRegex.IsMatch(name);
 
         public static string SafeVarName(this string text) => !string.IsNullOrEmpty(text) 

tests/ServiceStack.Text.Tests/StringExtensionsTests.cs

@@ -344,5 +344,14 @@ public void Can_convert_ToPascalCase()
             Assert.That("Aa_Bb".ToPascalCase(), Is.EqualTo("AaBb"));
             Assert.That("AA_BB".ToPascalCase(), Is.EqualTo("AaBb"));
         }
+
+        [Test]
+        public void Does_ContainsAny_Return_CaseInsensitive_Matches()
+        {
+            var testMatches = new string[] { "abc" };
+            var input = "ABC";
+
+            Assert.That(input.ContainsAny(StringComparison.OrdinalIgnoreCase, testMatches));
+        }
     }
 }