-----> Pruning devDependencies
npm ERR! path /tmp/build_534f1f8e2597fff7b8409f4169e854ec/node_modules/@tensorflow/tfjs-converter
npm ERR! code EISGIT
npm ERR! git /tmp/build_534f1f8e2597fff7b8409f4169e854ec/node_modules/@tensorflow/tfjs-converter: Appears to be a git repo or submodule.
npm ERR! git /tmp/build_534f1f8e2597fff7b8409f4169e854ec/node_modules/@tensorflow/tfjs-converter
npm ERR! git Refusing to remove it. Update manually,
npm ERR! git or move it out of the way first.
npm ERR! A complete log of this run can be found in:
npm ERR! /tmp/npmcache.2ObD1/_logs/2019-08-06T18_54_15_325Z-debug.log
auto commit to heroku keeps showing an error...