Prepare F-Droid release

LAST_RELEASE_VERCODE

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+272

fastlane/metadata/android/en-US/changelogs/272.txt

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+Initial public release of JMP SIM Manager.

prepare_release.sh

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+#!/usr/bin/env bash
+
+set -e
+
+new_version=$(($(git rev-list --first-parent --count HEAD) + 1))
+echo "New version code will be: ${new_version}"
+echo "${new_version}" > ./LAST_RELEASE_VERCODE
+
+changelog_path="./fastlane/metadata/android/en-US/changelogs"
+mkdir -p ${changelog_path}
+changelog_file="${changelog_path}/${new_version}.txt"
+echo "Creating new changelog: ${changelog_file}"
+touch "${changelog_file}"
+echo "Please populate the changelog above, then create ONE commit, and tag the release."