Auto merge of #381 - theduke:patch-1, r=jdm

Bump heapsize to at least 0.4.1 (relicensed)

Heapsize was released as `0.4.1` to reflect the license change. (https://github.com/servo/heapsize/pull/85).

Fixes https://github.com/servo/rust-url/issues/317.

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Cargo.toml

@@ -41,7 +41,7 @@ heap_size = ["heapsize"]
 
 [dependencies]
 encoding = {version = "0.2", optional = true}
-heapsize = {version = ">=0.1.1, <0.5", optional = true}
+heapsize = {version = ">=0.4.1, <0.5", optional = true}
 idna = { version = "0.1.0", path = "./idna" }
 matches = "0.1"
 percent-encoding = { version = "1.0.0", path = "./percent_encoding" }