bump yaml-rust to 0.4

[ignatenkobrain]

Signed-off-by: Igor Gnatenko i.gnatenko.brain@gmail.com

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Some tests are still failing, so help is very welcomed (probably those are bugs in yaml-rust)..

---- test_basic_struct stdout ----
	thread 'test_basic_struct' panicked at 'assertion failed: `(left == right)`
  left: `"---\nx: -4\ny: \"hi\\tquoted\"\nz: true"`,
 right: `"---\nx: -4\n\"y\": \"hi\\tquoted\"\nz: true"`', tests/test_serde.rs:27:4
note: Run with `RUST_BACKTRACE=1` for a backtrace.

---- test_map stdout ----
	thread 'test_map' panicked at 'assertion failed: `(left == right)`
  left: `"---\nx: 1\ny: 2"`,
 right: `"---\nx: 1\n\"y\": 2"`', tests/test_serde.rs:27:4

---- test_nested_vec stdout ----
	thread 'test_nested_vec' panicked at 'assertion failed: `(left == right)`
  left: `"---\n-\n  - 1\n  - 2\n  - 3\n-\n  - 4\n  - 5\n  - 6"`,
 right: `"---\n- - 1\n  - 2\n  - 3\n- - 4\n  - 5\n  - 6"`', tests/test_serde.rs:27:4

[killercup]

same as #83?

[ignatenkobrain]

didn't notice that one... I think there are some bugs somewhere... because I think that "y": "quoted\tstring" is the right one.

[dtolnay]

Thanks!