Change how helper file is loaded (bats v1.6.0) (#187)

Author: maria-robobug

modules/test/test-hello-world.bats

@@ -1,6 +1,6 @@
 # #!./test/libs/bats/bin/bats
 
-load 'test/test_helper.bash'
+load 'test_helper'
 
 @test "[hello-world] - start-using.js" {
   runExample $HELLO_WORLD_DIR start-using.js

modules/test/test-howtos.bats

@@ -1,6 +1,6 @@
 # #!./test/libs/bats/bin/bats
 
-load 'test/test_helper.bash'
+load 'test_helper'
 
 @test "[howtos] - analytics.js" {
     runExample $HOWTOS_DIR analytics.js