GitHub action (#173)

* add option to run OpenCommit as a Github Action

src/utils/randomIntFromInterval.ts

@@ -0,0 +1,4 @@
+export function randomIntFromInterval(min: number, max: number) {
+  // min and max included
+  return Math.floor(Math.random() * (max - min + 1) + min);
+}

src/utils/sleep.ts

@@ -0,0 +1,3 @@
+export function sleep(ms: number) {
+  return new Promise((resolve) => setTimeout(resolve, ms));
+}