feat: add update version script

Author: Gabriel Borlea

update-version.sh

@@ -0,0 +1,40 @@
+#!/bin/bash
+
+if [[ $# -ne 1 ]]; then
+    echo "Please specify a version"
+    exit 1
+fi
+
+version=$1
+echo -e "## $version \n" > temp
+git fetch
+git checkout main
+git pull origin main --rebase
+
+latest_relase=$(git describe --tags --abbrev=0)
+git log $latest_relase..HEAD --no-merges --oneline --pretty=format:'* %s [%h](https://github.com/jitsi/jitsi-meet-flutter-sdk/commit/%H)' >> temp
+
+echo -e "\n" >> temp;
+
+cat CHANGELOG.md >> temp;
+
+cat temp > CHANGELOG.md;
+
+rm temp;
+badge_url="https:\/\/img.shields.io\/badge\/pub-v";
+badge_color="blue";
+version_regex="(\d+\.)?(\d+\.)?(\*|\d+)"
+perl -i -pe"s/$badge_url$version_regex-$badge_color/$badge_url$version-$badge_color/" README.md
+
+package_name="jitsi_meet_flutter_sdk"
+perl -i -pe"s/$package_name: \^$version_regex/$package_name: \^$version/" README.md
+
+perl -i -pe"s/version: $version_regex/version: $version/" pubspec.yaml
+
+cd example
+flutter pub get
+cd ..
+
+git add CHANGELOG.md pubspec.yaml README.md example/pubspec.lock
+git commit -m "v$version"
+git push origin main