Package.getActivationCommands is deprecated.

[duub]

Use activationCommands instead of activationEvents in your package.json
Commands should be grouped by selector as follows:

  "activationCommands": {
    "atom-workspace": ["foo:bar", "foo:baz"],
    "atom-text-editor": ["foo:quux"]
  }

Package.getActivationCommands (/usr/share/atom/resources/app.asar/src/package.js:808:9)
Package.hasActivationCommands (/usr/share/atom/resources/app.asar/src/package.js:733:20)
<unknown> (/usr/share/atom/resources/app.asar/src/package.js:187:24)
Package.measure (/usr/share/atom/resources/app.asar/src/package.js:165:15)
Package.load (/usr/share/atom/resources/app.asar/src/package.js:179:12)
PackageManager.loadPackage (/usr/share/atom/resources/app.asar/src/package-manager.js:372:14)