chore: move npm install

Author: achingbrain

.travis.yml

@@ -32,7 +32,9 @@ before_install:
   #- if [[ "$TRAVIS_OS_NAME" == "windows" ]]; then export NPM_CONFIG_PREFIX=c:\\npm_prefix PATH=/c/npm_prefix:$PATH; fi
   # workspaces require npm 7 or above
   - if [[ "$TRAVIS_OS_NAME" == "windows" ]]; then export NODE_INSTALL_DIR=`npm prefix -g` ; fi
-  - if [[ "$TRAVIS_OS_NAME" == "windows" ]]; then mv $NODE_INSTALL_DIR/node_modules/npm $NODE_INSTALL_DIR/node_modules/npm_old && node $NODE_INSTALL_DIR/node_modules/npm_old/bin/npm-cli.js i -g npm@latest ; fi
+  - if [[ "$TRAVIS_OS_NAME" == "windows" ]]; then mv $NODE_INSTALL_DIR/node_modules $NODE_INSTALL_DIR/node_modules_old ; fi
+  - if [[ "$TRAVIS_OS_NAME" == "windows" ]]; then mkdir $NODE_INSTALL_DIR/node_modules ; fi
+  - if [[ "$TRAVIS_OS_NAME" == "windows" ]]; then node $NODE_INSTALL_DIR/node_modules_old/npm/bin/npm-cli.js i -g npm@latest ; fi
   - if [[ "$TRAVIS_OS_NAME" != "windows" ]]; then npm install -g npm@latest ; fi
   # restore default prefix for windows - https://travis-ci.community/t/command-npm-i-g-npm-latest-fails/431/7
   #- if [[ "$TRAVIS_OS_NAME" == "windows" ]]; then export NPM_CONFIG_PREFIX=""; fi