Update API-CHANGES.txt

API-CHANGES.txt

@@ -1,3 +1,16 @@
+0.12.2:
+
++ Announcer
+  + >>on:doOnce:
++ String
+  + >>uriEncoded
+  + >>uriDecoded
+  + >>uriComponentEncoded
+  + >>uriComponentDecoded
++ Collection
+  + >>removeAll
+
+
 0.12.0:
 
 * SmalltalkMethodContext.prototype.fillBlock() takes a third 'index' parameter