Update package version to 4.20.4

pkg.info

@@ -1,10 +1,34 @@
 name: xfce4-session
 description: Session manager for Xfce
-version: 4.20.3
+version: 4.20.4
+revision: 1
 url: https://docs.xfce.org/xfce/xfce4-session/start
 license: GPL2-or-later
+maintainers:
+  - [email protected]
 architecture: any
-depends: ["gtk-layer-shell","hicolor-icon-theme","libsm","libwnck","libxfce4ui","libxfce4windowing","polkit","polkit-gnome","xfconf","xorg-iceauth","xorg-xinit","xorg-xrdb"]
-optional_depends: ["gnome-keyring","labwc"]
-make_depends: ["glib"]
 type: source
+depends:
+  - gtk-layer-shell
+  - hicolor-icon-theme
+  - libsm
+  - libwnck
+  - libxfce4ui
+  - libxfce4windowing
+  - polkit
+  - polkit-gnome
+  - xfconf
+  - xorg-iceauth
+  - xorg-xinit
+  - xorg-xrdb
+optional_depends:
+  - bzip2
+  - gnome-keyring
+  - labwc
+make_depends:
+  - glib
+downloads:
+  - url: https://archive.xfce.org/src/xfce/xfce4-session/${BPM_PKG_VERSION%.*}/xfce4-session-${BPM_PKG_VERSION}.tar.bz2
+    extract_to: ${BPM_SOURCE}
+    extract_strip_components: 1
+    checksum: 805c373378d080754d69dd2f20db95cdc066c89a4f024a41435ca0d66571c402

source.sh

@@ -2,16 +2,6 @@
 # BPM Expects the source code to be extracted into the automatically created 'source' directory which can be accessed using $BPM_SOURCE
 # BPM Expects the output files to be present in the automatically created 'output' directory which can be accessed using $BPM_OUTPUT
 
-DOWNLOAD="https://archive.xfce.org/src/xfce/xfce4-session/${BPM_PKG_VERSION%.*}/xfce4-session-${BPM_PKG_VERSION}.tar.bz2"
-FILENAME="${DOWNLOAD##*/}"
-
-# The prepare function is executed in the root of the temp directory
-# This function is used for downloading files and putting them into the correct location
-prepare() {
-  wget "$DOWNLOAD"
-  tar -xvf "$FILENAME" --strip-components=1 -C "$BPM_SOURCE"
-}
-
 # The build function is executed in the source directory
 # This function is used to compile the source code
 build() {