Bump version to 1.5.0 (beam-community#533)

Update version and changelog for version 1.5.0

CHANGELOG.md

@@ -1,3 +1,20 @@
+## [1.5.0] - 2020-05-05
+
+### New Additions
+* Support SendGrid `send_at` field ([#519])
+
+### Fixes/Enhancements
+* Fix variable substitution for nested maps in Mailgun templates ([#496])
+* Relax Jason version constraint ([#531])
+* SendGrid requires an `Accept` header ([#529])
+* Remove dead link in README ([#527])
+
+[#519]: https://github.com/thoughtbot/bamboo/pull/519
+[#496]: https://github.com/thoughtbot/bamboo/pull/496
+[#531]: https://github.com/thoughtbot/bamboo/pull/531
+[#529]: https://github.com/thoughtbot/bamboo/pull/529
+[#527]: https://github.com/thoughtbot/bamboo/pull/527
+
 ## [1.4.0] - 2020-01-24
 
 ### New Additions
@@ -275,6 +292,7 @@
 * `MandrillEmail` has been renamed to `MandrillHelper`. The API is the same so all you will have to do is rename your imports and/or aliases.
 * `Mailer.deliver/1` has been renamed to `Mandrill.deliver_now/1` to add clarity. See discussion here: https://github.com/paulcsmith/bamboo/issues/89
 
+[1.5.0]: https://github.com/thoughtbot/bamboo/compare/v1.4.0...v1.5.0
 [1.4.0]: https://github.com/thoughtbot/bamboo/compare/v1.3.0...v1.4.0
 [1.3.0]: https://github.com/thoughtbot/bamboo/compare/v1.2.0...v1.3.0
 [1.2.0]: https://github.com/thoughtbot/bamboo/compare/v1.1.0...v1.2.0

README.md

@@ -44,7 +44,7 @@ To install Bamboo, add it to your list of dependencies in `mix.exs`.
 
 ```elixir
 def deps do
- [{:bamboo, "~> 1.4"}]
+ [{:bamboo, "~> 1.5"}]
 end
 ```
 
@@ -294,7 +294,7 @@ Bamboo comes with JSON support out of the box via the [Jason] library. To use
 it, add `:jason` to your dependencies:
 
 ```elixir
-{:jason, "~> 1.1.0"}
+{:jason, "~> 1.0"}
 ```
 
 You can customize it to use another library via the `:json_library`
@@ -416,7 +416,6 @@ to design, develop, and grow your product.
 
 Thanks to @mtwilliams for an early version of the `SendGridAdapter`.
 
-
 <!-- Links -->
 
 [@princemaple]: https://github.com/princemaple

mix.exs

@@ -6,7 +6,7 @@ defmodule Bamboo.Mixfile do
  def project do
  [
  app: :bamboo,
- version: "1.4.0",
+ version: "1.5.0",
  elixir: "~> 1.2",
  source_url: @project_url,
  homepage_url: @project_url,