vendor: update all dependencies

vendor/google.golang.org/api/texttospeech/v1beta1/texttospeech-api.json

@@ -14,7 +14,7 @@
   "canonicalName": "Texttospeech",
   "description": "Synthesizes natural-sounding speech by applying powerful neural network models.",
   "discoveryVersion": "v1",
-  "documentationLink": "http://cloud.google.com/text-to-speech/",
+  "documentationLink": "https://cloud.google.com/text-to-speech/",
   "fullyEncodeReservedExpansion": true,
   "icons": {
     "x16": "http://www.google.com/images/icons/product/search-16.gif",
@@ -60,11 +60,6 @@
       "location": "query",
       "type": "string"
     },
-    "bearer_token": {
-      "description": "OAuth bearer token.",
-      "location": "query",
-      "type": "string"
-    },
     "callback": {
       "description": "JSONP",
       "location": "query",
@@ -85,12 +80,6 @@
       "location": "query",
       "type": "string"
     },
-    "pp": {
-      "default": "true",
-      "description": "Pretty-print response.",
-      "location": "query",
-      "type": "boolean"
-    },
     "prettyPrint": {
       "default": "true",
       "description": "Returns response with indentations and line breaks.",
@@ -163,7 +152,7 @@
       }
     }
   },
-  "revision": "20180425",
+  "revision": "20180601",
   "rootUrl": "https://texttospeech.googleapis.com/",
   "schemas": {
     "AudioConfig": {

vendor/google.golang.org/api/texttospeech/v1beta1/texttospeech-gen.go

@@ -1,6 +1,6 @@
 // Package texttospeech provides access to the Cloud Text-to-Speech API.
 //
-// See http://cloud.google.com/text-to-speech/
+// See https://cloud.google.com/text-to-speech/
 //
 // Usage example:
 //