[BUILD] minor fix travis build composer warning
[BUILD] minor fix travis build composer warning

composer in the build directory gave a warning that composer.lock was
outdated.

this was due to a change in 1fc5d86 of which this commit then is a fix-up.

p-makowski/n98-magerun2,p-makowski/n98-magerun2,p-makowski/n98-magerun2