Bug 1793227: update readme file with minimum php version to be 7.0
behatnotneeded Change-Id: I305389e6a242bc1efc4a18d355f62c734fd27221
behatnotneeded Change-Id: I305389e6a242bc1efc4a18d355f62c734fd27221
mentioned in commit bcf1f2ca
·mentioned in commit bcf1f2ca