message: CI: Build Linux releases with earlier Ubuntu versions
  This ensures they are linked to earlier versions of libc and
  libpcsclite.
  Debian packages are built with Ubuntu 18.04 as this is required for
  cargo-deb.
diff: @@ -20,7 +20,7 @@ jobs:
  name: [linux, armv7, arm64, windows, macos]
  include:
  - name: linux
  - os: ubuntu-latest
  + os: ubuntu-16.04
  build_deps: >
  libfuse-dev
  libpcsclite-dev
  @@ -29,7 +29,7 @@ jobs:
  asset_suffix: x86_64-linux.tar.gz
  - name: armv7
  - os: ubuntu-latest
  + os: ubuntu-16.04
  target: armv7-unknown-linux-gnueabihf
  build_deps: >
  gcc-arm-linux-gnueabihf
  @@ -41,7 +41,7 @@ jobs:
  asset_suffix: armv7-linux.tar.gz
  - name: arm64
  - os: ubuntu-latest
  + os: ubuntu-16.04
  target: aarch64-unknown-linux-gnu
  build_deps: >
  gcc-aarch64-linux-gnu
  @@ -116,7 +116,7 @@ jobs:
  deb:
  name: Debian ${{ matrix.name }}
  - runs-on: ubuntu-latest
  + runs-on: ubuntu-18.04
  strategy:
  matrix:
  name: [linux, armv7, arm64]
  