chore: Add all Teensy boards to CI

.travis.yml

@@ -9,12 +9,12 @@ os:
     - linux
 
 python:
-    - '2.7'
+    - "2.7"
 
 # Cache PlatformIO packages using Travis CI container-based infrastructure
 cache:
     directories:
-        - '~/.platformio'
+        - "~/.platformio"
 
 env:
     global:
@@ -74,7 +74,21 @@ script:
     # Build current example
     - |
         if [ ! "${BUILD_UNIT_TESTS}" ]; then
-            platformio ci --lib="." --board=uno --board="due" --board="leonardo" --board="micro" --board="nanoatmega328" --board="megaatmega2560"
+            platformio ci --lib="."       \
+                --board="uno"             \
+                --board="due"             \
+                --board="zero"            \
+                --board="leonardo"        \
+                --board="micro"           \
+                --board="nanoatmega328"   \
+                --board="megaatmega2560"  \
+                --board="teensy2"         \
+                --board="teensy30"        \
+                --board="teensy31"        \
+                --board="teensy35"        \
+                --board="teensy36"        \
+                --board="teensy40"        \
+                --board="teensylc"
         fi
 
 after_success: