Explicit install of sample code dependencies

Author: gnongsie

.github/workflows/nodejs-workflow.yml

@@ -57,6 +57,7 @@ jobs:
                 npm pack
                 PACKAGE_VERSION=$(grep '"version"' package.json | cut -d '"' -f 4 | head -n 1)
                 cd ../$sample_code_node
+                npm install
                 npm install file:../$sdk_node/authorizenet-$PACKAGE_VERSION.tgz
                 npm list
                 node test-runner.js