Update Keywords list to include most tokens (#244)

- Fixes https://github.com/Microsoft/vscode-mssql/issues/705
- Updated the keyword list to include most common keyword ranges and added test to cover top 10 missing keywords
- Fixed a bug in TestUtilities.cs where text range was not defined correctly.

test/Microsoft.SqlTools.ServiceLayer.Test/Formatter/GeneralFormatterTests.cs

@@ -0,0 +1,32 @@
+//
+// Copyright (c) Microsoft. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+//
+
+using Microsoft.SqlTools.ServiceLayer.Formatter;
+using Xunit;
+
+namespace Microsoft.SqlTools.ServiceLayer.Test.Formatter
+{
+    public class GeneralFormatterTests : FormatterUnitTestsBase
+    {
+        [Fact]
+        public void KeywordCaseConversionUppercase()
+        {
+            LoadAndFormatAndCompare("KeywordCaseConversion", 
+                GetInputFile("KeywordCaseConversion.sql"),
+                GetBaselineFile("KeywordCaseConversion_Uppercase.sql"), 
+                new FormatOptions() { KeywordCasing = CasingOptions.Uppercase }, 
+                verifyFormat: true);
+        }
+        [Fact]
+        public void KeywordCaseConversionLowercase()
+        {
+            LoadAndFormatAndCompare("KeywordCaseConversion",
+                GetInputFile("KeywordCaseConversion.sql"),
+                GetBaselineFile("KeywordCaseConversion_Lowercase.sql"),
+                new FormatOptions() { KeywordCasing = CasingOptions.Lowercase },
+                verifyFormat: true);
+        }
+    }
+}