Bump bb8 from 0.8.1 to 0.8.6 (#709)

* Update bb8 to 0.8.6

To get https://github.com/djc/bb8/pull/186 and https://github.com/djc/bb8/pull/189
which fix potential deadlocks (https://github.com/djc/bb8/issues/154).

Also, this (https://github.com/djc/bb8/pull/225) was needed to prevent a connection
leak which was conveniently spotted in our integration tests.

* Ignore ./.bundle (created by dev console)

---------

Co-authored-by: Jose Fernandez (magec) <joseferper@gmail.com>

Cargo.lock

@@ -192,12 +192,11 @@ checksum = "604178f6c5c21f02dc555784810edfb88d34ac2c73b2eae109655649ee73ce3d"
 
 [[package]]
 name = "bb8"
-version = "0.8.1"
+version = "0.8.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "98b4b0f25f18bcdc3ac72bdb486ed0acf7e185221fd4dc985bc15db5800b0ba2"
+checksum = "d89aabfae550a5c44b43ab941844ffcd2e993cb6900b342debf59e9ea74acdb8"
 dependencies = [
  "async-trait",
- "futures-channel",
  "futures-util",
  "parking_lot",
  "tokio",