Use rust 1.37.0

Seulgi Kim · mergify[bot] · commit e121bb88e2d8 · 2019-10-07T07:14:00.000Z
diff --git a/.travis.yml b/.travis.yml
@@ -1,6 +1,6 @@
 language: rust
 rust:
-  - 1.36.0
+  - 1.37.0
 stages:
   - name: test
     if: branch != docker-build
diff --git a/rust-toolchain b/rust-toolchain
@@ -1 +1 @@
-1.36.0
+1.37.0
