Update typings to include Discord provider config. (#92)

Author: chrisparsons83

index.d.ts

@@ -2,6 +2,7 @@ import { FastifyPlugin, FastifyRequest } from 'fastify';
 
 interface FastifyOAuth2 {
   APPLE_CONFIGURATION: ProviderConfiguration;
+  DISCORD_CONFIGURATION: ProviderConfiguration;
   FACEBOOK_CONFIGURATION: ProviderConfiguration;
   GITHUB_CONFIGURATION: ProviderConfiguration;
   LINKEDIN_CONFIGURATION: ProviderConfiguration;

index.test-d.ts

@@ -49,6 +49,7 @@ expectType<Credentials>(credentials);
 expectError(fastifyOauth2()); // error because missing required arguments
 expectError(fastifyOauth2(server, {}, () => {})); // error because missing required options
 
+expectAssignable<ProviderConfiguration>(fastifyOauth2.DISCORD_CONFIGURATION);
 expectAssignable<ProviderConfiguration>(fastifyOauth2.FACEBOOK_CONFIGURATION);
 expectAssignable<ProviderConfiguration>(fastifyOauth2.GITHUB_CONFIGURATION);
 expectAssignable<ProviderConfiguration>(fastifyOauth2.GOOGLE_CONFIGURATION);