Auto merge of #48 - nox:bump, r=Wafflespeanut

Bump to 0.3.3

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Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "heapsize"
-version = "0.3.2"
+version = "0.3.3"
 authors = [ "The Servo Project Developers" ]
 description = "Infrastructure for measuring the total runtime size of an object on the heap"
 license = "MPL-2.0"