Switch to new download format

pkg.info

@@ -7,3 +7,7 @@ architecture: any
 depends: ["aspell"]
 make_depends: ["bzip2"]
 type: source
+downloads:
+  - url: https://ftpmirror.gnu.org/gnu/aspell/dict/en/aspell6-en-${BPM_PKG_VERSION}-0.tar.bz2
+    extract_to: ${BPM_SOURCE}
+    extract_strip_components: 1

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://ftpmirror.gnu.org/gnu/aspell/dict/en/aspell6-en-${BPM_PKG_VERSION}-0.tar.bz2"
-FILENAME="${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() {