message: Bump Rust version to 1.40
diff: @@ -13,7 +13,7 @@ workflows:
  jobs:
  base:
  docker:
  - - image: rust:1.39
  + - image: rust:1.40
  steps:
  - checkout
  - run:
  @@ -71,7 +71,7 @@ jobs:
  cranelift_vm:
  docker:
  - - image: rust:1.39
  + - image: rust:1.40
  steps:
  - checkout
  - run:
  @@ -142,7 +142,7 @@ jobs:
  fmt:
  docker:
  - - image: rust:1.39
  + - image: rust:1.40
  steps:
  - checkout
  - run:
  @@ -179,7 +179,7 @@ jobs:
  clippy:
  docker:
  - - image: rust:1.39
  + - image: rust:1.40
  steps:
  - checkout
  - run:
  