v0.18.0rc1

• drop combining compile time option
• bump mozjs dependency to 128
• console.assert (and extension console.exit)
• test option for testing js code
• added document.scripting_sleep_on_error option #319
• skip hidden elements #341
• fix linking -lexecinfo #337
• Serbian translation update
• Polish translation update
• detect if gettext has _nl_msg_cat_cntr #325
• added reopen-last-closed-tab action #309
• added options for memory limits of Spidermonkey and QuickJS
• gemini input #121
• compilation fixes