Document changes and release 5.13.16pureos1 of linux-librem5

Signed-off-by: Martin Kepplinger <martin.kepplinger@puri.sm>

debian/changelog

+linux-librem5 (5.13.16pureos1) byzantium; urgency=medium
+
+  [ Sebastian Krzyszkowiak ]
+  * [0b8b758] power: supply: max17042_battery: Clear status bits in interrupt handler
+  * [3e74739] power: supply: max17042_battery: Prevent int underflow in set_soc_threshold
+  * [d5a7641] usb: typec: tipd: Export PRESENT property
+  * [b331a7d] power: supply: bq25890_charger: Don't enable OTG on unplugged USB
+  * [cebf129] power: supply: max17042_battery: log SOC threshold using debug log level
+  * [37dfa30] usb: typec: tipd: Read active PDO on probe
+  * [357f153] power: supply: bq25890_charger: Read external power props on probe
+
+  [ Martin Kepplinger ]
+  * [157a679] Merge tag 'v5.13.16' into stable/5.13.16
+
+ -- Martin Kepplinger <martin.kepplinger@puri.sm>  Wed, 15 Sep 2021 12:47:44 +0200
+
 linux-librem5 (5.13.14pureos1) byzantium; urgency=medium
 
   [ Martin Kepplinger ]