Bump RUST_TOOLCHAIN for CI tests

This commit bumps the version of RUST_TOOLCHAIN
and rustfmt-nightly crate for CI tests.

The rustfmt-nightly crate has caret version dependencies
on rustc* crates that can cause newer dependencies versions
to be brought in that do not work with an older nightly
toolchain.

Author: russcam

.ci/DockerFile

@@ -6,7 +6,7 @@
 # FROM rustlang/rust:${RUST_TOOLCHAIN}
 FROM debian:stretch-slim
 
-ARG RUST_TOOLCHAIN=nightly-2020-06-09
+ARG RUST_TOOLCHAIN=nightly-2020-07-27
 
 ENV RUSTUP_HOME=/usr/local/rustup \
     CARGO_HOME=/usr/local/cargo \

.ci/run-repository.sh

@@ -10,7 +10,7 @@ script_path=$(dirname $(realpath -s $0))
 source $script_path/functions/imports.sh
 set -euo pipefail
 
-RUST_TOOLCHAIN=${RUST_TOOLCHAIN-nightly-2020-06-09}
+RUST_TOOLCHAIN=${RUST_TOOLCHAIN-nightly-2020-07-27}
 ELASTICSEARCH_URL=${ELASTICSEARCH_URL-"$elasticsearch_url"}
 elasticsearch_container=${elasticsearch_container-}
 

api_generator/Cargo.toml

@@ -20,7 +20,7 @@ quote = "~0.3"
 reduce = "0.1.2"
 regex = "1.3.1"
 reqwest = "~0.9"
-rustfmt-nightly = "1.4.17"
+rustfmt-nightly = "1.4.19"
 semver = "0.9.0"
 serde = "~1"
 serde_json = "~1"