Restrict rand dependency to < 0.7

The rand team briefly published (and then yanked) release 0.7.0, which
raises the MSRV to 1.32.0, breaking some of our tests.  This commit
restricts rand to < 0.7 so we won't run into that problem again.

1 files changed, 1 insertions, 1 deletions

diff --git a/Cargo.toml b/Cargo.toml
index 3c1260ab..f8e4bee9 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -27,7 +27,7 @@ cc = "1"
 [dev-dependencies]
 bytes = "0.4.8"
 lazy_static = "1.2"
-rand = "0.6"
+rand = ">= 0.6, < 0.7"
 tempfile = "3.0.5"
 
 [target.'cfg(any(target_os = "android", target_os = "linux"))'.dev-dependencies]