Fix most dialyzer errors

[joshsmith]

No description provided.

[joshsmith]

Remaining issues are mostly known and just need time/effort to resolve.

[joshsmith]

These are the remaining ones:

:0: Unknown function 'Elixir.Mix':env/0
:0: Unknown type 'Elixir.Stripe':api_error_struct/0
:0: Unknown type 'Elixir.Stripe.List':'of'/1
lib/stripe/connect/external_account.ex:70: Call to missing or unexported function 'Elixir.Stripe.Request':create/3
lib/stripe/connect/external_account.ex:79: Call to missing or unexported function 'Elixir.Stripe.Request':retrieve/2
lib/stripe/connect/external_account.ex:90: Call to missing or unexported function 'Elixir.Stripe.Request':update/3
lib/stripe/connect/external_account.ex:100: Call to missing or unexported function 'Elixir.Stripe.Request':delete/3
lib/stripe/connect/external_account.ex:110: Call to missing or unexported function 'Elixir.Stripe.Request':retrieve/3
lib/stripe/connect/oauth.ex:85: Call to missing or unexported function 'Elixir.Stripe':oauth_request/3
lib/stripe/connect/oauth.ex:111: Call to missing or unexported function 'Elixir.Stripe':oauth_request/3
lib/stripe/core_resources/file_upload.ex:44: Call to missing or unexported function 'Elixir.Stripe.Request':create_file_upload/4
lib/stripe/core_resources/file_upload.ex:53: Call to missing or unexported function 'Elixir.Stripe.Request':retrieve_file_upload/2
lib/stripe/core_resources/file_upload.ex:62: Call to missing or unexported function 'Elixir.Stripe.Request':retrieve/3

[coveralls]

Coverage remained the same at 75.335% when pulling d6b2def on fix-most-dialyzer-errors into bee3ff4 on 2.0-beta.

[coveralls]

Coverage remained the same at 75.335% when pulling d6b2def on fix-most-dialyzer-errors into bee3ff4 on 2.0-beta.

[coveralls]

Coverage remained the same at 75.335% when pulling d6b2def on fix-most-dialyzer-errors into bee3ff4 on 2.0-beta.

[coveralls]

Coverage remained the same at 75.335% when pulling c028166 on fix-most-dialyzer-errors into bee3ff4 on 2.0-beta.

[coveralls]

Coverage remained the same at 75.335% when pulling c028166 on fix-most-dialyzer-errors into bee3ff4 on 2.0-beta.

[coveralls]

Coverage remained the same at 75.335% when pulling c028166 on fix-most-dialyzer-errors into bee3ff4 on 2.0-beta.

[asummers]

What kinda list? Keyword.t?

[coveralls]

Coverage remained the same at 75.335% when pulling 296213e on fix-most-dialyzer-errors into bee3ff4 on 2.0-beta.