v4.1.0

• Up default memory limit to 2048 MB
• Add missing space in core error message
• Up default project PHP version from PHP 7.1 to PHP 7.2 (latest)
• The core and indexes are now stored somewhere else, in a semi-persistent folder
  • The core will now no longer be reinstalled every time this package updates if its version remains the same
  • This avoids an EBUSY error during update on Windows
  • The base locations used are (concatenated with the package name):
    • Windows: process.env.APPDATA
    • Linux: process.env.HOME + '/.cache'
    • macOS: process.env.HOME + 'Library/Preferences'