Increase timeout upper limit even more to pass tests under valgrind

Author: pinepain

tests/V8Isolate_limit_time.phpt

@@ -29,7 +29,7 @@ if ($helper->need_more_time()) {
   // On travis when valgrind active it takes more time to complete all operations so we just increase initial limits
   $time_limit = 5.0;
   $low_range = 4.5;
-  $high_range = 10.0;
+  $high_range = 20.0;
 } else {
   $time_limit = 1.5;
   $low_range = 1.45;

tests/V8Isolate_limit_time_nested.phpt

@@ -61,7 +61,7 @@ if ($helper->need_more_time()) {
     // On travis when valgrind active it takes more time to complete all operations so we just increase initial limits
     $time_limit = 5.0;
     $low_range = 4.5;
-    $high_range = 10.0;
+    $high_range = 20.0;
 } else {
     $time_limit = 1.5;
     $low_range = 1.45;

tests/V8Isolate_limit_time_set_during_execution.phpt

@@ -21,7 +21,7 @@ if ($helper->need_more_time()) {
     // On travis when valgrind active it takes more time to complete all operations so we just increase initial limits
     $time_limit = 5.0;
     $low_range = 4.5;
-    $high_range = 10.0;
+    $high_range = 20.0;
 } else {
     $time_limit = 1.5;
     $low_range = 1.45;