Add python3-lal to build and runtime requirements
This MR adds a missing build and runtime requirement on python3-lal
to the python3-lscsoft-glue
package - lal
is a requirement for glue.ligolw
, and python3-lal
doesn't depend on glue any more, so this is ok.
This, along with !90 (merged) and !79 (merged) closes #7 (closed).