Update go-github library

vendor/github.com/google/go-github/test/README.md

@@ -54,7 +54,7 @@ This test sends real network traffic to the GitHub API and will exhaust the
 default unregistered rate limit (60 requests per hour) very quickly.
 Additionally, some data is only returned for authenticated API calls. Unlike
 the integration tests above, these tests only read data, so it's less
-imperitive that these be run using a dedicated test account (though you still
+imperative that these be run using a dedicated test account (though you still
 really should).
 
 Run the fields tool using:

vendor/github.com/google/go-github/test/fields/fields.go

@@ -25,7 +25,7 @@ import (
 	"reflect"
 	"strings"
 
-	"github.com/google/go-github/github"
+	"github.com/google/go-github/v19/github"
 	"golang.org/x/oauth2"
 )
 

vendor/github.com/google/go-github/test/integration/repos_test.go

@@ -108,19 +108,12 @@ func TestRepositories_EditBranches(t *testing.T) {
 		t.Fatalf("Branch %v of repo %v is already protected", "master", *repo.Name)
 	}
 
-	// TODO: This test fails with 422 Validation Failed [{Resource: Field: Code: Message:}].
-	//       Someone familiar with protection requests needs to come up with
-	//       a valid protection request that doesn't give 422 error.
 	protectionRequest := &github.ProtectionRequest{
 		RequiredStatusChecks: &github.RequiredStatusChecks{
 			Strict:   true,
 			Contexts: []string{"continuous-integration"},
 		},
 		RequiredPullRequestReviews: &github.PullRequestReviewsEnforcementRequest{
-			DismissalRestrictionsRequest: &github.DismissalRestrictionsRequest{
-				Users: []string{},
-				Teams: []string{},
-			},
 			DismissStaleReviews: true,
 		},
 		EnforceAdmins: true,
@@ -141,13 +134,11 @@ func TestRepositories_EditBranches(t *testing.T) {
 			Contexts: []string{"continuous-integration"},
 		},
 		RequiredPullRequestReviews: &github.PullRequestReviewsEnforcement{
-			DismissalRestrictions: github.DismissalRestrictions{
-				Users: []*github.User{},
-				Teams: []*github.Team{},
-			},
-			DismissStaleReviews: true,
+			DismissStaleReviews:          true,
+			RequiredApprovingReviewCount: 0,
 		},
 		EnforceAdmins: &github.AdminEnforcement{
+			URL:     github.String("https://api.github.com/repos/" + *repo.Owner.Login + "/" + *repo.Name + "/branches/master/protection/enforce_admins"),
 			Enabled: true,
 		},
 		Restrictions: nil,

vendor/github.com/google/go-github/test/integration/users_test.go

@@ -203,7 +203,7 @@ func TestUsers_Keys(t *testing.T) {
 		t.Fatalf("Users.ListKeys('') returned error: %v", err)
 	}
 
-	var id int
+	var id int64
 	for _, k := range keys {
 		if k.Key != nil && *k.Key == key {
 			id = *k.ID