Update NEWS for 0.2.5

NEWS

@@ -3,8 +3,11 @@ Changes between 0.2.4 and 0.2.5:
 
  * Add cancellation support without pipe()
  * Continued port to Windows
+ * Fix teardown crash and wrong asserts
+ * Fix potential crash
  * Minor build system cleanup
 
+
 Changes between 0.2.3 and 0.2.4:
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