fix: create package/lib when there is something to install there (#12)

action.yml

@@ -40,12 +40,16 @@ runs:
       run: |
         if [ -f "poetry.lock" ]
         then
-          pip install poetry
-          if [ -f "globalConfig.json" ]
+          pip install poetry            
+          poetry export --without-hashes -o requirements.txt
+          if [ "$(grep -cve '^\s*$' requirements.txt)" -ne 0 ]
           then
-            echo " globalConfig.json found, creating package/lib and exporting poetry dependencies "
+            echo "Prod dependencies were found, creating package/lib folder"
             mkdir -p package/lib || true
-            poetry export --without-hashes -o package/lib/requirements.txt
+            mv requirements.txt package/lib
+          else
+            echo "No prod dependencies were found"
+            rm requirements.txt
           fi
           poetry export --without-hashes --dev -o requirements_dev.txt
           if [ ! -z $INPUT_VERSION ]