Bump version to 0.8.0

Author: mathieuprog

README.md

@@ -8,7 +8,7 @@ module can, by default, only operate on datetimes in the UTC time zone. Alternat
 third-party libraries, such as `tz`, to bring in time zone support and deal with datetimes in other time zones than UTC.
 
 The `tz` library relies on the [time zone database](https://data.iana.org/time-zones/tzdb/) maintained by
-[IANA](https://www.iana.org). As of version 0.7.3, `tz` uses version _tzdata2019c_ of the IANA time zone database.
+[IANA](https://www.iana.org). As of version 0.8.0, `tz` uses version _tzdata2019c_ of the IANA time zone database.
 
 ## Features
 
@@ -52,7 +52,7 @@ defp deps do
   [
     {:castore, "~> 0.1.5"},
     {:mint, "~> 1.0"},
-    {:tz, "~> 0.7.3"}
+    {:tz, "~> 0.8.0"}
   ]
 end
 ```
@@ -105,7 +105,7 @@ Add `tz` for Elixir as a dependency in your `mix.exs` file:
 ```elixir
 def deps do
   [
-    {:tz, "~> 0.7.3"}
+    {:tz, "~> 0.8.0"}
   ]
 end
 ```

mix.exs

@@ -1,7 +1,7 @@
 defmodule Tz.MixProject do
   use Mix.Project
 
-  @version "0.7.3"
+  @version "0.8.0"
 
   def project do
     [