bump version and add changelog for 19.12

CHANGELOG

@@ -1,6 +1,18 @@
 Change Log for Releases
 ==============================
 
+## 19.12
+  * Add 5G NR RRC and NGAP ASN1 packing/unpacking
+  * Add sync routines and broadcast channel for Sidelink
+  * Add cell search and MIB decoder for NB-IoT
+  * Add PDCP discard
+  * Improve RRC Reestablishment handling
+  * Improve RRC cell measurements and procedure handling
+  * Add multi-carrier and MIMO support to ZMQ radio
+  * Refactor eNB scheduler to support multiple carriers
+  * Apply clang-format style on entire code base
+  * Other bug-fixes and improved stability and performance in all parts
+
 ## 19.09
   * Add initial support for NR in MAC/RLC/PDCP
   * Add sync code for NB-IoT

cmake/modules/SRSLTEVersion.cmake

@@ -19,6 +19,6 @@
 #
 
 SET(SRSLTE_VERSION_MAJOR 19)
-SET(SRSLTE_VERSION_MINOR 9)
+SET(SRSLTE_VERSION_MINOR 12)
 SET(SRSLTE_VERSION_PATCH 0)
 SET(SRSLTE_VERSION_STRING "${SRSLTE_VERSION_MAJOR}.${SRSLTE_VERSION_MINOR}.${SRSLTE_VERSION_PATCH}")