fix(scope): increase default ScopeDigestTTL to 10 iterations

Author: chirayuk

lib/core/scope.dart

@@ -65,7 +65,7 @@ class ScopeEvent {
 @Injectable()
 class ScopeDigestTTL {
   final int ttl;
-  ScopeDigestTTL(): ttl = 5;
+  ScopeDigestTTL(): ttl = 10;
   ScopeDigestTTL.value(this.ttl);
 }
 
@@ -678,7 +678,7 @@ class RootScope extends Scope {
   * [digest] calls the associated [ReactionFn]. Since a [ReactionFn] may further change the model,
   * [digest] processes changes multiple times until no more changes are detected.
   *
-  * If the model does not stabilize within 5 iterations, an exception is thrown. See
+  * If the model does not stabilize within 10 iterations, an exception is thrown. See
   * [ScopeDigestTTL].
   */
   void digest() {

test/core/scope_spec.dart

@@ -1218,11 +1218,11 @@ void main() {
 
         expect(() {
           rootScope.digest();
-        }).toThrow('Model did not stabilize in 5 digests. '
-        'Last 3 iterations:\n'
-        'a: 2 <= 1, b: 2 <= 1\n'
-        'a: 3 <= 2, b: 3 <= 2\n'
-        'a: 4 <= 3, b: 4 <= 3');
+        }).toThrow('Model did not stabilize in 10 digests. '
+                   'Last 3 iterations:\n'
+                   'a: 7 <= 6, b: 7 <= 6\n'
+                   'a: 8 <= 7, b: 8 <= 7\n'
+                   'a: 9 <= 8, b: 9 <= 8');
       });
 
 
@@ -1232,7 +1232,7 @@ void main() {
 
         expect(() {
           rootScope.digest();
-        }).toThrow('Model did not stabilize in 5 digests. '
+        }).toThrow('Model did not stabilize in 10 digests. '
         'Last 3 iterations:\n'
         'async:1\n'
         'async:1\n'