Bump pom-scijava to 2.3

Updates to the latest pom-scijava release: 2.3. Also increaes the
imagej-ui-swing dependencies to 0.4.0, to reflect changes to
scijava-ui-swing that were made in pom-scijava 2.3.
Bump ij1-patcher version

Increases ij1-patcher version to the latest: 0.4.3.