chore: windows

Author: achingbrain

.travis.yml

@@ -29,7 +29,8 @@ before_install:
   - if [[ "$TRAVIS_OS_NAME" == "windows" ]]; then export PATH=/c/PROGRA~1/Git/usr/bin:/c/PROGRA~1/Git/mingw64/libexec/git-core:$PATH ; fi
   - if [[ "$TRAVIS_OS_NAME" == "windows" ]]; then npm config set script-shell powershell ; fi
   # workspaces require npm 7 or above
-  - npm install -g npm@latest
+  - if [[ "$TRAVIS_OS_NAME" == "windows" ]]; then powershell npm install -g npm@latest ; fi
+  - if [[ "$TRAVIS_OS_NAME" != "windows" ]]; then npm install -g npm@latest ; fi
 
 script: npx nyc -s npm run test -- -- -- -t node --bail
 after_success: npx nyc report --reporter=text-lcov > coverage.lcov && npx codecov