Temporarily running tests using experimental BP test bootloader

Conflicts:
	tests/bootstrap.php
Revert "Bumps version number to 1.3.1"

This reverts commit ee32306df827b0c6454ae40b58334feb8d7468d1.
Revert "Revert "Bumps version number to 1.3.1""

This reverts commit bb465754b3d3fd189b9967d55b6358510638f9cf.
Revert "Temporarily running tests using experimental BP test bootloader"

This reverts commit b32630c1ecae2a28463dd28c1c097bb853764833.