chore(CI): update Python for Node 17

Author: brettz9

.travis.yml

@@ -13,6 +13,11 @@ before_install:
 install:
   - echo "Avoid Travis's npm auto-install"
 before_script: >
+  node_version=$(node -v);
+  if [ ${node_version:1:2} = "17" ]; then
+    echo "Updating Python"
+    apk add --update --no-cache python3
+  fi
   npm install --legacy-peer-deps --no-save "eslint@${ESLINT}"
 notifications:
   email: false