{
  "name": "@girder/fontello",
  "version": "0.0.0",
  "description": "Built Fontello files for use in Girder.",
  "license": "Apache-2.0",
  "repository": {
    "type": "git",
    "url": "git+https://github.com/girder/girder.git"
  },
  "bugs": {
    "url": "https://github.com/girder/girder/issues"
  },
  "main": "index.js",
  "scripts": {
    "build": "grunt",
    "prepublishOnly": "$npm_execpath install && $npm_execpath run build"
  },
  "devDependencies": {
    "grunt": "^1.0.3",
    "grunt-contrib-clean": "^2.0.0",
    "grunt-fontello": "^0.3.6"
  },
  "keywords": [
    "fontello",
    "girder"
  ]
}

{
  "name": "@girder/fontello",
  "version": "0.0.0",
  "description": "Built Fontello files for use in Girder.",
  "license": "Apache-2.0",
  "repository": {
    "type": "git",
    "url": "git+https://github.com/girder/girder.git"
  },
  "bugs": {
    "url": "https://github.com/girder/girder/issues"
  },
  "main": "index.js",
  "scripts": {
    "build": "grunt",
    "prepublishOnly": "$npm_execpath install && $npm_execpath run build"
  },
  "devDependencies": {
    "grunt": "^1.0.3",
    "grunt-contrib-clean": "^2.0.0",
    "grunt-fontello": "^0.3.7"
  },
  "keywords": [
    "fontello",
    "girder"
  ]
}

Upgrade grunt-fontello to fix building on node 12
Upgrade grunt-fontello to fix building on node 12
