update some dependencies (#208)

* update some dependencies

* some more

* add these

* remove things?

* regen

vendor/github.com/google/go-github/github/apps.go

@@ -0,0 +1,40 @@
+// Copyright 2016 The go-github AUTHORS. All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package github
+
+import "context"
+
+// AppsService provides access to the installation related functions
+// in the GitHub API.
+//
+// GitHub API docs: https://developer.github.com/v3/apps/
+type AppsService service
+
+// ListInstallations lists the installations that the current GitHub App has.
+//
+// GitHub API docs: https://developer.github.com/v3/apps/#find-installations
+func (s *AppsService) ListInstallations(ctx context.Context, opt *ListOptions) ([]*Installation, *Response, error) {
+	u, err := addOptions("app/installations", opt)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	req, err := s.client.NewRequest("GET", u, nil)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	// TODO: remove custom Accept header when this API fully launches.
+	req.Header.Set("Accept", mediaTypeIntegrationPreview)
+
+	var i []*Installation
+	resp, err := s.client.Do(ctx, req, &i)
+	if err != nil {
+		return nil, resp, err
+	}
+
+	return i, resp, nil
+}