(ci) Update Rust versions built on travis

Since Rust 1.23 was released, only build 1.22 and 1.21 now.
This commit is contained in:
Christoph Herzog 2018-01-13 10:43:21 +01:00
parent 40c946c81c
commit 5c976ba60d

View file

@ -8,7 +8,7 @@ rust:
- nightly
# Prevent accidentally breaking older Rust versions
- 1.20.0
- 1.22.0
- 1.21.0
env: