Force upgrade of pip in install_dev.sh (stanford-crfm#1905)

Author: Lorenzo Pacchiardi

install-dev.sh

@@ -11,6 +11,8 @@ if [[ $OSTYPE != 'darwin'* ]]; then
 fi
 # Install all pinned dependencies
 pip install -r requirements.txt
+# upgrade pip to install in edit mode without setup.py
+pip install --upgrade pip
 # Install HELM in edit mode
 pip install -e .[all]
 # Check dependencies