###### Motivation for this change
Update to latest upstream version
###### Things done
* [ ] Tested using sandboxing ([nix.useSandbox](http://nixos.org/nixos/manual/options.html#opt-nix.useSandbox) on NixOS, or option `sandbox` in [`nix.conf`](http://nixos.org/nix/manual/#sec-conf-file) on non-NixOS linux)
* Built on platform(s)
* [x] NixOS
* [ ] macOS
* [ ] other Linux distributions
* [ ] Tested via one or more NixOS test(s) if existing and applicable for the change (look inside [nixos/tests](https://github.com/NixOS/nixpkgs/blob/master/nixos/tests))
* [ ] Tested compilation of all pkgs that depend on this change using `nix-shell -p nix-review --run "nix-review wip"`
* [x] Tested execution of all binary files (usually in `./result/bin/`)
* [ ] Determined the impact on package closure size (by running `nix path-info -S` before and after)
* [ ] Ensured that relevant documentation is up to date
* [x] Fits [CONTRIBUTING.md](https://github.com/NixOS/nixpkgs/blob/master/.github/CONTRIBUTING.md).
###### Notify maintainers
cc @worldofpeace @tfc @jtraue
Changes since the last release
New and changed parameters:
Two additional parameters are available in gcloud: P9K_GCLOUD_CONFIGURATION and P9K_GCLOUD_PROJECT_NAME.
gcloud segment can now be in two states: PARTIAL and COMPLETE. See documentation.
Wizard:
The screen asking whether to display current time now offers a choice between two formats: 24-hour and 12-hour.
os_icon is no longer bold.
Slanted and flat separators are now using glyphs from Box Drawing Unicode block. They should look much better in fonts with correctly sized Box Drawing glyphs.
gcloud now displays project name instead of project id whenever possible.
Bug fixes:
Powerlevel10k no longer resolves symbolic links when calling commands that might act differently depending on argv[0].
java_version now works properly when using AdoptOpenJDK.
Misc:
Arch Linux users can now install Powerlevel10k with pacman. See instructions.
There is a new version of MesloLGS NF (the recommended font) with better alignment of powerline glyphs and 44% larger icons (by area). iTerm2 users can upgrade by typing p10k configure. Users of other terminals can follow manual installation instructions.
