update test runner to use bats-assert in tests (#21)

Author: glennj

bin/run-tests-in-docker.sh

@@ -1,4 +1,4 @@
-#! /bin/bash -e
+#!/usr/bin/env bash
 
 # Synopsis:
 # Test the test runner Docker image by running it against a predefined set of 

bin/run-tests.sh

@@ -1,4 +1,4 @@
-#! /bin/bash
+#!/usr/bin/env bash
 
 # Synopsis:
 # Test the test runner by running it against a predefined set of solutions 

bin/run.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 set -o errexit
 set -o nounset