Add a configuration option to specify the location of a provisioning profile

Following on from #2142:

When building for the mas-dev target, by default, a provisioning profile in the working directory is automatically used for code signing by electron-osx-sign. It would be good to be able to pass a CLI arg or set a config file parameter to specify a location for the file and pass it on with e.g.

electron-osx-sign path/to/my.app --provisioning-profile=path/to/my.provisionprofile

or using the provisioning-profile option in calls to require('electron-osx-sign').sign/signAsync

[holgersindbaek]

Is anyone working on this? Would it be possible to specify a provisioning profile in the settings?

Something like this:

"build": {
    "appId": "com.copany.someapp",
    "productName": "someapp",
    "buildVersion": "1.0.11",
    "mac": {
      "target": [
        "mas-dev"
      ],
      "category": "public.app-category.games",
      "icon": "src/electron/assets/store.icns",
      "entitlements": "src/electron/entitlements.mac.plist",
      "type": "development"
    },
    "mas-dev": {
      "category": "public.app-category.games",
      "entitlements": "src/electron/entitlements.mas.plist",
      "type": "distribution",
      "provisioning-profile": "src/electron/mas-dev.provisioningProfile"
    },
    "files": [
      "src/electron.js",
      "src/electron/**/*",
      "package.json"
    ],
  },

[develar]

Only me can fix doc generator, I hope this week.