Recent failures of the Mbed OS target came from two independent
issues:
- some python packages started requiring Python>=2.7.10, and
- the latest Intervaltree 3.0.0 release was released broken.
This patch ensures a fresh python by 'lying' to the CI that this
is a Python project (Python images on the CI come with a recent
interpreter, not with the one shipped as default with the OS), and
locks Intervaltree to a stable version.
JerryScript-DCO-1.0-Signed-off-by: Akos Kiss [email protected]