Changes since v4.15.1:

• Fix another type warning in push command for new environments
• Remove undefined variable in activate command
• Fix warning about strpos() after pushing

v4.15.1...v4.15.2

SHA-256 checksum for platform.phar:
d4291f6f5de70af4cdc6a6f0fb589ffb792fc2ceb41835d84d64c12708d71129