A new postinstall script was detected in version 0.12.0-pre of the package forms-angular.

Script content:

if [ -d 'node_modules/bower' ]; then bower install --config.directory=node_modules --production jquery@2.0.3 bootstrap-2-3-2=git://github.com/twbs/bootstrap.git#v2.3.2 bootstrap-3-3-7=git://github.com/twbs/bootstrap.git#v3.3.7; fi

see npm documentation on package scripts for more details.
and the detector. to understand why this script might be dangerous.
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This could be a security risk. Please investigate.