libqmi: 1.18.0 -> 1.20.0

Semi-automatic update. These checks were performed:

- built on NixOS
- ran `/nix/store/zv2yn5d1z16kcmi5p3766mh5v5imp8ky-libqmi-1.20.0/bin/qmi-network --help` got 0 exit code
- ran `/nix/store/zv2yn5d1z16kcmi5p3766mh5v5imp8ky-libqmi-1.20.0/bin/qmi-network --version` and found version 1.20.0
- ran `/nix/store/zv2yn5d1z16kcmi5p3766mh5v5imp8ky-libqmi-1.20.0/bin/qmicli -h` got 0 exit code
- ran `/nix/store/zv2yn5d1z16kcmi5p3766mh5v5imp8ky-libqmi-1.20.0/bin/qmicli --help` got 0 exit code
- ran `/nix/store/zv2yn5d1z16kcmi5p3766mh5v5imp8ky-libqmi-1.20.0/bin/qmicli -V` and found version 1.20.0
- ran `/nix/store/zv2yn5d1z16kcmi5p3766mh5v5imp8ky-libqmi-1.20.0/bin/qmicli --version` and found version 1.20.0
- ran `/nix/store/zv2yn5d1z16kcmi5p3766mh5v5imp8ky-libqmi-1.20.0/bin/qmi-firmware-update -h` got 0 exit code
- ran `/nix/store/zv2yn5d1z16kcmi5p3766mh5v5imp8ky-libqmi-1.20.0/bin/qmi-firmware-update --help` got 0 exit code
- ran `/nix/store/zv2yn5d1z16kcmi5p3766mh5v5imp8ky-libqmi-1.20.0/bin/qmi-firmware-update -V` and found version 1.20.0
- ran `/nix/store/zv2yn5d1z16kcmi5p3766mh5v5imp8ky-libqmi-1.20.0/bin/qmi-firmware-update --version` and found version 1.20.0
- found 1.20.0 with grep in /nix/store/zv2yn5d1z16kcmi5p3766mh5v5imp8ky-libqmi-1.20.0
- found 1.20.0 in filename of file in /nix/store/zv2yn5d1z16kcmi5p3766mh5v5imp8ky-libqmi-1.20.0

cc "@wkennington"