Don't use default Composer CA bundle if in phar as not included so won't work. #72
Description
From original @swiffer wp-cli/wp-cli#4703
Running WP-CLI 1.5.0 I cannot install new commands via
wp package list / install
failed to open stream: phar error: "vendor/composer/ca-bundle/res/cacert.pem" is not a file in phar
As we don't include Composer's CA bundle in the phar the default "last resort" doesn't work CaBundle.php#L121 so should avoid it. Noticeable particularly on Windows as default paths searched by Composer won't usually find anything.
PR incoming.