Give more leeway to thread allocations

Author: jhawthorn

test/test_allocations.rb

@@ -49,7 +49,7 @@ def test_sample_rate
   def test_thread_allocation
     result = Vernier.trace(allocation_interval: 1) do
       Thread.new do
-        100.times do
+        1000.times do
           Object.new
         end
       end.join
@@ -62,6 +62,6 @@ def test_thread_allocation
 
     allocation_samples = other_thread.dig(:allocations, :samples)
 
-    assert_includes 100..130, allocation_samples.count
+    assert_includes 1000..1100, allocation_samples.count
   end
 end