Always use secure random as a default

lib/data.dart

@@ -1,7 +1,7 @@
 import 'package:uuid/rng.dart';
 
 /// [GlobalOptions] stores the global options passed into the library on instantiation.
-/// [GlobalOptions.rng] is the random number generator class to use. Defaults to MathRNG() [MathRNG]
+/// [GlobalOptions.rng] is the random number generator class to use. Defaults to CryptoRNG() [CryptoRNG]
 class GlobalOptions {
   final RNG? rng;
 
@@ -32,7 +32,7 @@ class V1Options {
 /// [V4Options] stores the options passed into the v4 function.
 /// [random] is the random bytes to use to generate the UUID. Primarily used for
 /// testing, or recreating a UUID
-/// [rng] is the random number generator function to use. Defaults to MathRNG() [MathRNG]
+/// [rng] is the random number generator function to use. Defaults to CryptoRNG() [CryptoRNG]
 class V4Options {
   final List<int>? random;
   final RNG? rng;
@@ -116,7 +116,7 @@ class V1State {
   static int? clockSeq = 0;
   static int mSecs = 0;
   static int nSecs = 0;
-  static RNG random = MathRNG();
+  static RNG random = CryptoRNG();
   static bool initialized = false;
 }
 
@@ -126,7 +126,7 @@ class V1State {
 /// initialized once already. Prevents re-initialization on subsequent calls to
 /// _init() from within the v4 function.
 class V4State {
-  static RNG random = MathRNG();
+  static RNG random = CryptoRNG();
   static bool initialized = true;
 }
 
@@ -143,7 +143,7 @@ class V6State {
   static int? clockSeq;
   static int mSecs = 0;
   static int nSecs = 0;
-  static RNG random = MathRNG();
+  static RNG random = CryptoRNG();
   static bool initialized = false;
 }
 
@@ -153,7 +153,7 @@ class V6State {
 /// initialized once already. Prevents re-initialization on subsequent calls to
 /// _init() from within the v4 function.
 class V7State {
-  static RNG random = MathRNG();
+  static RNG random = CryptoRNG();
   static bool initialized = true;
 }
 
@@ -163,6 +163,6 @@ class V7State {
 /// initialized once already. Prevents re-initialization on subsequent calls to
 /// _init() from within the v4 function.
 class V8State {
-  static RNG random = MathRNG();
+  static RNG random = CryptoRNG();
   static bool initialized = true;
 }

lib/uuid.dart

@@ -48,13 +48,13 @@ class Uuid {
   /// for all UUID generation.
   /// [GlobalOptions.rng] is a [RNG] class that returns a list of random bytes.
   ///
-  /// Defaults rng function is `UuidUtil.mathRNG`
+  /// Defaults rng function is `UuidUtil.cryptoRNG`
   ///
-  /// Example: Using CryptoRNG globally
+  /// Example: Using MathRNG globally
   ///
   /// ```dart
   /// var uuid = Uuid(options: {
-  ///   'grng': UuidUtil.cryptoRNG
+  ///   'grng': UuidUtil.mathRNG
   /// })
   ///
   /// // Generate a v4 (random) id that will use cryptRNG for its rng function
@@ -244,7 +244,7 @@ class Uuid {
 
   /// Generates a RNG version 4 UUID
   ///
-  /// By default it will generate a string based mathRNG, and will return
+  /// By default it will generate a string based cryptoRNG, and will return
   /// a string. If you wish to use crypto-strong RNG, pass in UuidUtil.cryptoRNG
   ///
   /// The first argument is an options map that takes various configuration
@@ -315,7 +315,7 @@ class Uuid {
 
   /// Generates a RNG version 4 UUID into a provided buffer
   ///
-  /// By default it will generate a string based off mathRNG, and will
+  /// By default it will generate a string based off cryptoRNG, and will
   /// place the result into the provided [buffer]. The [buffer] will also be returned.
   /// If you wish to have crypto-strong RNG, pass in UuidUtil.cryptoRNG.
   ///
@@ -349,7 +349,7 @@ class Uuid {
 
   /// Generates a RNG version 4 UUID as a [UuidValue] object
   ///
-  /// By default it will generate a string based mathRNG, and will return
+  /// By default it will generate a string based cryptoRNG, and will return
   /// a [UuidValue] object. If you wish to use crypto-strong RNG, pass in UuidUtil.cryptoRNG
   ///
   /// The first argument is an options map that takes various configuration

lib/v4.dart

@@ -8,7 +8,7 @@ class UuidV4 {
 
   /// v4() Generates a RNG version 4 UUID
   ///
-  /// By default it will generate a string based mathRNG, and will return
+  /// By default it will generate a string based cryptoRNG, and will return
   /// a string. If you wish to use crypto-strong RNG, pass in UuidUtil.cryptoRNG
   ///
   /// The first argument is an options map that takes various configuration