v1.3.13 fixes v1.3.12 that was tagged from the wrong branch.

New feature:

• Added support for notifications when a bubble opens #1000 (@gparant)

Bug fixes / improvements:

• Now using the "visibilitychange" event to detect changes in the browser #1033 (@moufmouf)
• Closing game camera when Jitsi opens #1034 (@moufmouf)
• Turning noise suppression back on #1036 (@tabascoeye)