aportupgrade command for upgrading APKBUILDs (!1752)

The gist of this action is upgrading the specified aport to the latest
version. There are implementations for both stable packages (which check
via the release-monitoring.org API for new versions) and git packages
(which check the GitLab/GitHub API for new commits on the main branch).

There's also the possibility to pass --all, --all-stable & --all-git to
the action which either loops through all packages, or just stable or
git packages and upgrades them.

The --dry argument is also respected.

Note, that the implementation does update the variables pkgver, pkgrel
and _commit but it doesn't update the checksums because that would slow
down the process a lot, and is potentially undesirable.

pmb/helpers/frontend.py

@@ -28,10 +28,10 @@ import sys
 import pmb.aportgen
 import pmb.build
 import pmb.build.autodetect
-import pmb.config
 import pmb.chroot
 import pmb.chroot.initfs
 import pmb.chroot.other
+import pmb.config
 import pmb.export
 import pmb.flasher
 import pmb.helpers.git
@@ -42,6 +42,7 @@ import pmb.helpers.pmaports
 import pmb.helpers.repo
 import pmb.helpers.repo_missing
 import pmb.helpers.run
+import pmb.helpers.aportupgrade
 import pmb.install
 import pmb.parse
 import pmb.qemu
@@ -340,6 +341,19 @@ def pkgrel_bump(args):
         sys.exit(1)
 
 
+def aportupgrade(args):
+    if args.all or args.all_stable or args.all_git:
+        pmb.helpers.aportupgrade.upgrade_all(args)
+    else:
+        # Each package must exist
+        for package in args.packages:
+            pmb.helpers.pmaports.find(args, package)
+
+        # Check each package for a new version
+        for package in args.packages:
+            pmb.helpers.aportupgrade.upgrade(args, package)
+
+
 def qemu(args):
     pmb.qemu.run(args)