Get the AUR version ourselves rather than using archversion to handle it (which no longer works)

archversion.conf

@@ -1,5 +1,5 @@
 [DEFAULT]
-downstream = aur
+downstream = none
 eval_upstream = version.replace("-", ".").replace("_",".").replace("/",".")
 regex_exclude = ""
 timeout = 10

checkversion

@@ -130,9 +130,7 @@ function archversion_check() {
         upstream_version=$(grep -oE 'up: [^ ]*' <<< "$archversion_output" \
             | sed 's|up: ||')
 
-        package_version=$(grep -oE 'aur: [^ ]*' <<< "$archversion_output" \
-            | sed 's|aur: ||' \
-            | sed 's|^[0-9][0-9]*:||')
+        package_version=$(yay -Sia "$pkg" | grep -e '^Version' | sed 's|^Version *: *||;s|-[0-9]$||')
 
         # Compare versions and handle accordingly
         vercmp_check "$pkg" "$upstream_version" "$package_version"