Update README and FTS5 Trigram

Author: marcprux

README.md

@@ -5,10 +5,11 @@ with built-in [SQLCipher] and [Full-text search] extensions,
 along with a [SQLiteDB] Swift package that provides
 API parity with the venerable [SQLite.swift] project.
 
-This is a stand-along and platform-agnostic project, and 
+This is a stand-alone and platform-agnostic project, and 
 does not presume the presence of any SQLite binary.
 It is therefore suitable for embedded projects or 
-environments without any accessible `sqlite3.so` library (e.g., Android).
+environments without any accessible system `sqlite3`
+library (e.g., Android, Windows).
 
 ## Features
 

Sources/SQLiteDB/Extensions/FTS4.swift

@@ -115,9 +115,19 @@ public struct Tokenizer {
         return Tokenizer("unicode61", arguments)
     }
 
-    // https://sqlite.org/fts5.html#the_experimental_trigram_tokenizer
-    public static func Trigram(caseSensitive: Bool = false) -> Tokenizer {
-        Tokenizer("trigram", ["case_sensitive", caseSensitive ? "1" : "0"])
+    // https://sqlite.org/fts5.html#the_trigram_tokenizer
+    public static func Trigram(caseSensitive: Bool? = false, removeDiacritics: Bool? = nil) -> Tokenizer {
+        var arguments = [String]()
+
+        if let caseSensitive {
+            arguments.append("case_sensitive \(caseSensitive ? 1 : 0)")
+        }
+
+        if let removeDiacritics {
+            arguments.append("remove_diacritics \(removeDiacritics ? 1 : 0)")
+        }
+
+        return Tokenizer("trigram", arguments)
     }
 
     public static func Custom(_ name: String) -> Tokenizer {