readme: simplify composer command (#42)

I found a shorter way to add a composer repository to a project. This
also makes the command work in Windows OS.

Bump to release 1.3.0 in readme (#34)

config: set temp storage to in-memory (#25)

This seems a better default for a PHP web app.

jenkins: fix cleanup permission issue (#19)

* arm64 support

Replace build.sh script by Makefile (god help us) so part of it can be
run on a different platform or container.

The new release contains 2 binaries, one for each of the supported
platforms.

I tested this on a Dragonboard 410c.

* jenkins: fix cleanup permission

project: implement binding for statObject() (#15)

* Update phpstan

* project: implement binding for statObject()

Initial version squashed commits (#8)