Auto merge of #15150 - BorisChiou:update_selectors, r=heycam

Update selectors to 0.15.1

selectors 0.15.1 supports AFFECTED_BY_ANIMATIONS and
AFFECTED_BY_TRANSITIONS, which are used by stylo animations.

Reference:
https://bugzilla.mozilla.org/show_bug.cgi?id=1317209

---
- [X] `./mach build -d` does not report any errors
- [X] `./mach test-tidy` does not report any errors
- [X] These changes fix Bug 1317209
- [X] These changes do not require tests because I only update the version, which only added two StyleRelations flags, and are not used yet

<!-- Reviewable:start -->
---
This change is [<img src="https://reviewable.io/review_button.svg" height="34" align="absmiddle" alt="Reviewable"/>](https://reviewable.io/reviews/servo/servo/15150)
<!-- Reviewable:end -->

1 files changed, 1 insertions, 1 deletions

diff --git a/components/script/Cargo.toml b/components/script/Cargo.toml
index 4f13003b7f2..bb34846065d 100644
--- a/components/script/Cargo.toml
+++ b/components/script/Cargo.toml
@@ -69,7 +69,7 @@ regex = "0.2"
 rustc-serialize = "0.3"
 script_layout_interface = {path = "../script_layout_interface"}
 script_traits = {path = "../script_traits"}
-selectors = "0.15"
+selectors = "0.15.1"
 serde = "0.8"
 servo_atoms = {path = "../atoms"}
 servo_config = {path = "../config", features = ["servo"] }