Update CI API tokens

The previous tokens were leaked and invalidated. Use config variables
for Sauce Connect on Travis to eliminate the risk of env var leakage
there.

scripts/appveyor/delete_old_artifacts.ps1

@@ -38,7 +38,7 @@ function Get-AuthorizationHeaderValue($username, $password) {
 }
 
 $currentBranch = $env:APPVEYOR_REPO_BRANCH
-$bintrayToken = $env:bintray_token
+$bintrayToken = $env:bintray_auth_token
 $bintrayRepoUrl = 'https://api.bintray.com/packages/wrinklyninja/loot'
 $bintrayHeaders = @{ Authorization = (Get-AuthorizationHeaderValue 'wrinklyninja' $bintrayToken) }
 $packages = @(

scripts/appveyor/update_masterlist_branches.ps1

@@ -15,7 +15,7 @@ if ($env:APPVEYOR_REPO_TAG -eq 'true') {
   $branchName = Get-BranchName
 
   Write-Output "`nUpdating masterlists' default branch to $branchName..."
-  lomad -t $env:access_token -a -d $branchName
+  lomad -t $env:github_auth_token -a -d $branchName
 
   if ($lastexitcode -eq 0) {
     Write-Output "Masterlists' default branches have been updated."