Update dependencies
Update dependencies

Includes a security update for humbug/humbug_get_contents:
https://github.com/humbug/file_get_contents/pull/23/files

It could only affect PHP running under a CGI SAPI, not in command-line usage.
Normal (possibly all) usage of the Platform.sh CLI would be via the command
line.

pjcdawkins/platformsh-cli,platformsh/platformsh-cli,pjcdawkins/platformsh-cli,pjcdawkins/platformsh-cli,platformsh/platformsh-cli,platformsh/platformsh-cli