watermark_text docs and spec

Author: DarthSim

README.md

@@ -225,6 +225,7 @@ builder.url_for("http://images.example.com/images/image2.jpg")
 - [unsharpening](https://docs.imgproxy.net/generating_the_url?id=unsharpening) _(pro)_
 - [watermark](https://docs.imgproxy.net/generating_the_url?id=watermark)
 - [watermark_url](https://docs.imgproxy.net/generating_the_url?id=watermark-url) _(pro)_
+- [watermark_text](https://docs.imgproxy.net/generating_the_url?id=watermark-text) _(pro)_
 - [style](https://docs.imgproxy.net/generating_the_url?id=style) _(pro)_
 - [jpeg_options](https://docs.imgproxy.net/generating_the_url?id=jpeg-options) _(pro)_
 - [png_options](https://docs.imgproxy.net/generating_the_url?id=png-options) _(pro)_

lib/imgproxy.rb

@@ -87,6 +87,7 @@ def configure
     # @option options [String] :unsharpening supported only by imgproxy pro
     # @option options [Hash|Array|Float|String] :watermark
     # @option options [String] :watermark_url supported only by imgproxy pro
+    # @option options [String] :watermark_text supported only by imgproxy pro
     # @option options [String] :style supported only by imgproxy pro
     # @option options [Hash|Array|String] :jpeg_options supported only by imgproxy pro
     # @option options [Hash|Array|String] :png_options supported only by imgproxy pro

lib/imgproxy/options_aliases.rb

@@ -27,6 +27,7 @@ module Imgproxy
     unsharpening: :ush,
     watermark: :wm,
     watermark_url: :wmu,
+    watermark_text: :wmt,
     style: :st,
     jpeg_options: :jpego,
     png_options: :pngo,

spec/imgproxy_spec.rb

@@ -93,6 +93,7 @@
           scale: 0.1,
         },
         watermark_url: "https://images.test/wm.svg",
+        watermark_text: "the watermark",
         style: "color: rgba(255, 255, 255, .5)",
         jpeg_options: {
           progressive: true,
@@ -156,6 +157,7 @@
         "ush:always",
         "wm:0.5:noea:10:5:0.1",
         "wmu:aHR0cHM6Ly9pbWFnZXMudGVzdC93bS5zdmc",
+        "wmt:dGhlIHdhdGVybWFyaw",
         "st:Y29sb3I6IHJnYmEoMjU1LCAyNTUsIDI1NSwgLjUp",
         "jpego:1:0:1:0:1:5",
         "pngo:0:1:128",
@@ -203,6 +205,7 @@
         "unsharpening:always",
         "watermark:0.5:noea:10:5:0.1",
         "watermark_url:aHR0cHM6Ly9pbWFnZXMudGVzdC93bS5zdmc",
+        "watermark_text:dGhlIHdhdGVybWFyaw",
         "style:Y29sb3I6IHJnYmEoMjU1LCAyNTUsIDI1NSwgLjUp",
         "jpeg_options:1:0:1:0:1:5",
         "png_options:0:1:128",