fix

.drone.yml

   commands:
   - git config --global user.email "frontwork.me@gmail.com"
   - git config --global user.name "drone"
-  - PACKAGE_VERSION $(cat package.json | grep version | head -1 | awk -F: '{ print $2 }' | sed 's/[\",]//g' | tr -d '[[:space:]]')
-  - LATEST_VERSION $(npm view rpclibrary | grep latest | head -1 | awk -F: '{ print $2 }' | sed 's/[\",]//g' | tr -d '[[:space:]]')
+  - export PACKAGE_VERSION=$(cat package.json | grep version | head -1 | awk -F: '{ print $2 }' | sed 's/[\",]//g' | tr -d '[[:space:]]')
+  - export LATEST_VERSION=$(npm view rpclibrary | grep latest | head -1 | awk -F: '{ print $2 }' | sed 's/[\",]//g' | tr -d '[[:space:]]')
   - >- if [ "${PACKAGE_VERSION}" != "${LATEST_VERSION}" ]; 
     then
       git tag $PACKAGE_VERSION