Fix for 3.0.2 not able to compile for Teensy#88

Merged

wmacevoy merged 1 commit intommurdoch:masterfrom ssilverman:master

Mar 21, 2019

+8-1

Commits on Mar 17, 2019

Fix for TEENSYDUINO not having the protected String::concat(const char *, unsigned int); it has String::append instead.
ssilverman
committed