Merge pull request #1129 from volta-cli/dependabot/cargo/indexmap-1.8.0

Bump indexmap from 1.7.0 to 1.8.0

Author: charlespierce

Cargo.lock

@@ -50,7 +50,7 @@ ci_info = "0.14.3"
 hyperx = "1.4.0"
 attohttpc = { version = "0.18.0", features = ["json"] }
 chain-map = "0.1.0"
-indexmap = "1.7.0"
+indexmap = "1.8.0"
 retry = "1.3.0"
 fs2 = "0.4.3"