v1.3.0

### Major Release v1.3.0

1. Fix SMS receive bug.
2. Add option to load Root Certs only when necessary for SSL.
3. Add ThingStream MQTT(S) support and example.
4. Add UDP functions to permit specify host
5. Add GSM_LOGATDEBUG macro to help debug AT-command related functions
6. Add support to SoftwareSerial
7. Fully tested on **u-blox SARA-G350 modem and nRF52-based NINA_B302_ublox board**

README.md

@@ -1800,12 +1800,10 @@ Check [**U-BLOX NINA B302 + GSM ACCESSING THINGSTREAM.IO (SSL)**](https://nina-b
 Debug is enabled by default on Serial. Debug Level from 0 to 4. To disable, change the `_GSM_GENERIC_LOGLEVEL_` to 0
 
 ```cpp
-// Use this to output debug msgs to Serial
 #define DEBUG_GSM_GENERIC_PORT       Serial
 
-// Use this to disable all output debug msgs
-// Debug Level from 0 to 4
-#define _GSM_GENERIC_LOGLEVEL_       0
+// Debug Level from 0 to 5. Level 5 is to print out AT commands and responses
+#define _GSM_GENERIC_LOGLEVEL_       5
 ```
 
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