[rust] Update rust-toolchain from 2019-02-08 to 2019-02-25

Clippy and rust-fmt are on the show again! 🎉
use-ink · Feb 25, 2019 · b93c711 · b93c711
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commit b93c711
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/rust-toolchain b/rust-toolchain
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-nightly-2019-02-08
+nightly-2019-02-25