chore(deps): update dependency oauth2 to v2

mix.exs

@@ -46,7 +46,7 @@ defmodule GoogleApis.Mixfile do
     [
       {:google_api_discovery, "~> 0.12.0"},
       {:tesla, "~> 1.8"},
-      {:oauth2, "~> 0.9"},
+      {:oauth2, "~> 2.0"},
       {:temp, "~> 0.4"},
       {:jason, "~> 1.1"},
       {:poison, "~> 3.1"}

mix.lock

@@ -8,7 +8,7 @@
   "metrics": {:hex, :metrics, "1.0.1", "25f094dea2cda98213cecc3aeff09e940299d950904393b2a29d191c346a8486", [:rebar3], [], "hexpm", "69b09adddc4f74a40716ae54d140f93beb0fb8978d8636eaded0c31b6f099f16"},
   "mime": {:hex, :mime, "1.6.0", "dabde576a497cef4bbdd60aceee8160e02a6c89250d6c0b29e56c0dfb00db3d2", [:mix], [], "hexpm", "31a1a8613f8321143dde1dafc36006a17d28d02bdfecb9e95a880fa7aabd19a7"},
   "mimerl": {:hex, :mimerl, "1.2.0", "67e2d3f571088d5cfd3e550c383094b47159f3eee8ffa08e64106cdf5e981be3", [:rebar3], [], "hexpm", "f278585650aa581986264638ebf698f8bb19df297f66ad91b18910dfc6e19323"},
-  "oauth2": {:hex, :oauth2, "0.9.4", "632e8e8826a45e33ac2ea5ac66dcc019ba6bb5a0d2ba77e342d33e3b7b252c6e", [:mix], [{:hackney, "~> 1.7", [hex: :hackney, repo: "hexpm", optional: false]}], "hexpm", "407c6b9f60aa0d01b915e2347dc6be78adca706a37f0c530808942da3b62e7af"},
+  "oauth2": {:hex, :oauth2, "2.1.0", "beb657f393814a3a7a8a15bd5e5776ecae341fd344df425342a3b6f1904c2989", [:mix], [{:tesla, "~> 1.5", [hex: :tesla, repo: "hexpm", optional: false]}], "hexpm", "8ac07f85b3307dd1acfeb0ec852f64161b22f57d0ce0c15e616a1dfc8ebe2b41"},
   "parse_trans": {:hex, :parse_trans, "3.4.1", "6e6aa8167cb44cc8f39441d05193be6e6f4e7c2946cb2759f015f8c56b76e5ff", [:rebar3], [], "hexpm", "620a406ce75dada827b82e453c19cf06776be266f5a67cff34e1ef2cbb60e49a"},
   "poison": {:hex, :poison, "3.1.0", "d9eb636610e096f86f25d9a46f35a9facac35609a7591b3be3326e99a0484665", [:mix], [], "hexpm", "fec8660eb7733ee4117b85f55799fd3833eb769a6df71ccf8903e8dc5447cfce"},
   "ssl_verify_fun": {:hex, :ssl_verify_fun, "1.1.7", "354c321cf377240c7b8716899e182ce4890c5938111a1296add3ec74cf1715df", [:make, :mix, :rebar3], [], "hexpm", "fe4c190e8f37401d30167c8c405eda19469f34577987c76dde613e838bbc67f8"},