added example for testing

example/example.js

@@ -0,0 +1,19 @@
+import logger from '../src/logger'
+let log = {}
+
+class LOGTEST {
+  constructor(opts) {
+    log = logger({
+      name: 'test',
+      id: opts.id,
+      file: 'example/example.js',
+      class: 'LOGTEST'
+    })
+  }
+
+}
+
+let test = new LOGTEST({id:'process-test1'})
+
+log.info({test:'filter', msg:'this is a logged message'})
+log.fatal('this is a fatal logged message')