Use ESPSoftwareSerial fork, fixes 9600 baud problems

code/platformio.ini

@@ -21,7 +21,7 @@ lib_deps =
     NtpClientLib
     OneWire
     Brzo I2C
-    EspSoftwareSerial
+    https://github.com/krosk93/espsoftwareserial#a770677
     PMS Library
     https://bitbucket.org/xoseperez/justwifi.git#1.1.4
     https://bitbucket.org/xoseperez/hlw8012.git#1.1.0