{
    "name": "eventEmitter",
    "description": "Event based JavaScript for the browser",
    "version": "5.1.0",
    "main": [
        "./EventEmitter.js"
    ],
    "author": {
        "name": "Oliver Caldwell",
        "web": "http://oli.me.uk/"
    },
    "license": "Unlicense",
    "keywords": [
        "events",
        "structure"
    ],
    "ignore": [
        "docs",
        "tests",
        "tools",
        ".gitignore",
        "package.json"
    ]
}

{
    "name": "eventEmitter",
    "description": "Event based JavaScript for the browser",
    "version": "5.1.0",
    "main": "EventEmitter.js",
    "author": {
        "name": "Oliver Caldwell",
        "web": "http://oli.me.uk/"
    },
    "license": "Unlicense",
    "keywords": [
        "events",
        "structure"
    ],
    "ignore": [
        "docs",
        "tests",
        "tools",
        ".gitignore",
        "package.json"
    ]
}

Remove array in main property.
Remove array in main property.

Webpack fails to find the file and my build procedure crashes.