parse: apkindex: fix provider_priority never actually being an int

provider_priority was actually a string all along! make it an int as type hinting suggests, and add some tests for apkindex parsing.

cc: @Newbyte

pmb/parse/test_apkindex.py

-
-
 from pmb.core.arch import Arch
 
 from .apkindex import parse as parse_apkindex
@@ -231,6 +229,7 @@ k:10
 D:blkid btrfs-progs buffyboard busybox-extras bzip2 cryptsetup device-mapper devicepkg-utils>=0.2.0 dosfstools e2fsprogs e2fsprogs-extra f2fs-tools font-terminus iskey kmod libinput-libs lz4 multipath-tools parted postmarketos-fde-unlocker postmarketos-mkinitfs>=2.2 udev unudhcpd util-linux-misc xz
 p:postmarketos-ramdisk=3.3.5-r2"""
 
+
 def test_apkindex_parse(tmp_path) -> None:
     tmpfile = tmp_path / "APKINDEX.1"
     print(tmp_path)
@@ -249,7 +248,10 @@ def test_apkindex_parse(tmp_path) -> None:
     # and that it's one provider (postmarketos-initramfs) is declared
     assert "postmarketos-ramdisk" in blocks.keys()
     assert "postmarketos-initramfs" in blocks["postmarketos-ramdisk"].keys()
-    assert blocks["postmarketos-ramdisk"]["postmarketos-initramfs"] == blocks["postmarketos-initramfs"]["postmarketos-initramfs"]
+    assert (
+        blocks["postmarketos-ramdisk"]["postmarketos-initramfs"]
+        == blocks["postmarketos-initramfs"]["postmarketos-initramfs"]
+    )
 
     initramfs = blocks["postmarketos-initramfs"]["postmarketos-initramfs"]
     assert initramfs.pkgname == "postmarketos-initramfs"
@@ -288,11 +290,13 @@ def test_apkindex_parse(tmp_path) -> None:
     assert tinydm.provides == ["postmarketos-base-tinydm"]
     assert tinydm.version == "29-r1"
     assert tinydm.arch == Arch.aarch64
-    
+
     wayland = blocks["postmarketos-base-ui-wayland"]["postmarketos-base-ui-wayland"]
     # Doesn't provide an explicit version
     assert wayland.provides == []
     assert wayland.origin == "postmarketos-base-ui"
 
-    networkmanager = blocks["postmarketos-base-ui-networkmanager"]["postmarketos-base-ui-networkmanager"]
+    networkmanager = blocks["postmarketos-base-ui-networkmanager"][
+        "postmarketos-base-ui-networkmanager"
+    ]
     assert networkmanager.provider_priority is None