Add Travis

.travis.yml

@@ -0,0 +1,22 @@
+# Enable validating this file
+version: ~> 1.0
+
+language: python
+python:
+    - "2.7"
+sudo: false
+cache:
+    directories:
+        - "~/.platformio"
+
+jobs:
+  include:
+    - install:
+      - pip install -U platformio
+      - platformio update
+      script: ./build_platformio.sh
+
+notifications:
+  email:
+    on_success: change
+    on_failure: change

build_platformio.sh

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+#!/bin/bash
+
+set -euo pipefail
+
+pio lib -g install "ESP Async WebServer@1.2.3"
+
+pio ci --lib=. --board esp32dev "examples/ESP32_Async_Demo"
+pio ci --lib=. --board esp12e "examples/ESP8266_Async_Demo"