add support files to build and test

.flowconfig

@@ -0,0 +1,11 @@
+[ignore]
+
+[include]
+
+[libs]
+
+[lints]
+
+[options]
+
+[strict]

.gitignore

@@ -0,0 +1,2 @@
+dist/
+node_modules/

karma.config.js

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+module.exports = function(config) {
+  config.set({
+    frameworks: ['mocha', 'chai'],
+    files: ['./dist/session-resume.umd.js', 'test.js'],
+    reporters: ['mocha'],
+    port: 9876,
+    colors: true,
+    logLevel: config.LOG_INFO,
+    browsers: ['ChromeHeadless'],
+    autoWatch: false,
+    singleRun: true,
+    concurrency: Infinity
+  })
+}