1.4.5

• Fix custom extension scripts to not clone in working directory.
• Use files from this action instead of copying.
• Use tool-cache directory to store script for the action.
• Fix race condition in linux.sh to get correct php.ini
• Update node-version to 12.x for testing.
• Update action branding.
• Update PHP 7.4 versions in README.md
• Add support for PHP 7.4 for phalcon4