Update go client to beta 12 (#773)

Prepare release.

Author: therve

go.mod

@@ -1,7 +1,7 @@
 module github.com/terraform-providers/terraform-provider-datadog
 
 require (
-	github.com/DataDog/datadog-api-client-go v1.0.0-beta.11.0.20201123184336-31daae18ac22
+	github.com/DataDog/datadog-api-client-go v1.0.0-beta.12
 	github.com/cenkalti/backoff v2.1.1+incompatible // indirect
 	github.com/dnaeon/go-vcr v1.0.1
 	github.com/fatih/color v1.9.0 // indirect

go.sum

@@ -9,8 +9,8 @@ cloud.google.com/go/bigquery v1.0.1/go.mod h1:i/xbL2UlR5RvWAURpBYZTtm/cXjCha9lbf
 cloud.google.com/go/datastore v1.0.0/go.mod h1:LXYbyblFSglQ5pkeyhO+Qmw7ukd3C+pD7TKLgZqpHYE=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
 github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
-github.com/DataDog/datadog-api-client-go v1.0.0-beta.11.0.20201123184336-31daae18ac22 h1:LJaQRBGkC7FwalksmSJ1iYYhWEzYV4CzuAAk4bPD7OU=
-github.com/DataDog/datadog-api-client-go v1.0.0-beta.11.0.20201123184336-31daae18ac22/go.mod h1:/bMeu+q33QzX2JuO5PkGkhU1VYOXIXKEPF6Ck4yR06M=
+github.com/DataDog/datadog-api-client-go v1.0.0-beta.12 h1:qWUzuaQlPp2PhTqV3I5SFSTy8Bo2rubfZtmrlGyvyew=
+github.com/DataDog/datadog-api-client-go v1.0.0-beta.12/go.mod h1:/bMeu+q33QzX2JuO5PkGkhU1VYOXIXKEPF6Ck4yR06M=
 github.com/DataDog/datadog-go v3.6.0+incompatible h1:ILg7c5Y1KvZFDOaVS0higGmJ5Fal5O1KQrkrT9j6dSM=
 github.com/DataDog/datadog-go v3.6.0+incompatible/go.mod h1:LButxg5PwREeZtORoXG3tL4fMGNddJ+vMq1mwgfaqoQ=
 github.com/agext/levenshtein v1.2.1/go.mod h1:JEDfjyjHDjOF/1e4FlBE/PkbqA9OfWu2ki2W0IB5558=