TravisCI using fastlane failed with message "Your bundle is locked to credentials_manager (0.16.2)"

Problem

$ bundle install --jobs=3 --retry=3 --deployment
Fetching gem metadata from https://rubygems.org/........
Fetching version metadata from https://rubygems.org/..
Fetching dependency metadata from https://rubygems.org/.

Your bundle is locked to credentials_manager (0.16.2), but that version could
not be found in any of the sources listed in your Gemfile. If you haven't
changed sources, that means the author of credentials_manager (0.16.2) has
removed it. You'll need to update your bundle to a different version of
credentials_manager (0.16.2) that hasn't been removed in order to install.

Research

github.com

My legacy environments were fixed old fastlane version (1.103.0) and builds started breaking because credentials_manager version 0.16.2 has been removed from rubygems.

Solution

# frozen_string_literal: true
source "https://rubygems.org"

-gem "fastlane", "1.109.0"
+gem "fastlane", "2.5.0"

DRY

Swift実践入門 ── 直感的な文法と安全性を兼ね備えた言語 (WEB+DB PRESS plus)