Don't specify type of library

This allows us to toggle our entire project
from shared to static with only one option.

pi2-view/meson.build

@@ -15,7 +15,7 @@ ui_resources = gnome.compile_resources(
 )
 gtkmm_dep = dependency('gtkmm-3.0', version : '>=3.22.2')
 thread_dep = dependency('threads')
-pi2_view_lib = shared_library('pi2-view', [pi2_view_src, ui_resources],
+pi2_view_lib = library('pi2-view', [pi2_view_src, ui_resources],
     dependencies : [gtkmm_dep, thread_dep, microsoft_gsl_dep],
     include_directories: pi2_view_inc,
     install: true