Bump component versions

The following changes were made:
	imagej-common.version = 0.7.3 (latest net.imagej:imagej-common)

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Bump imagej-legacy preemptively

This helps imagej-legacy run the tests successfully in headless mode
because it now requires the latest ij1-patcher version to do so.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>