Add travis build

Author: simc

.travis.yml

@@ -0,0 +1,20 @@
+os:
+  - linux
+sudo: false
+addons:
+  apt:
+    # Flutter depends on /usr/lib/x86_64-linux-gnu/libstdc++.so.6 version GLIBCXX_3.4.18
+    sources:
+      - ubuntu-toolchain-r-test # if we don't specify this, the libstdc++6 we get is the wrong version
+    packages:
+      - libstdc++6
+      - fonts-droid
+before_script:
+  - git clone https://github.com/flutter/flutter.git -b beta
+  - ./flutter/bin/flutter doctor
+script:
+  - ./flutter/bin/flutter pub get
+  - ./flutter/bin/cache/dart-sdk/bin/dartfmt -n --set-exit-if-changed ./lib ./test ./example || travis_terminate 1
+cache:
+  directories:
+    - $HOME/.pub-cache

README.md

@@ -1,6 +1,6 @@
 # Logger
 
-[![Version](https://img.shields.io/pub/v/logger.svg)](https://pub.dev/packages/logger) ![Runtime](https://img.shields.io/badge/dart-%3E%3D2.1-brightgreen.svg) ![GitHub license](https://img.shields.io/badge/license-MIT-blue.svg?style=flat)
+[![Travis](https://img.shields.io/travis/com/leisim/logger/master.svg)](https://travis-ci.com/leisim/logger) [![Version](https://img.shields.io/pub/v/logger.svg)](https://pub.dev/packages/logger) ![Runtime](https://img.shields.io/badge/dart-%3E%3D2.1-brightgreen.svg) ![GitHub license](https://img.shields.io/badge/license-MIT-blue.svg?style=flat)
 
 Small, easy to use and extensible logger which prints beautiful logs.<br>
 Inspired by [logger](https://github.com/orhanobut/logger) for Android.

example/lib/main.dart

@@ -1,6 +1,6 @@
 import 'package:logger/logger.dart';
 
-var logger = Logger(printer: PrettyPrinter());
+var logger = Logger();
 
 var loggerNoStack = Logger(printer: PrettyPrinter(methodCount: 0));