chore: run crystal tool format and fix ameba issues

.gitignore

@@ -3,7 +3,7 @@
 /libs/
 /.crystal/
 /.shards/
-
+/bin/
 
 # Libraries don't need dependency lock
 # Dependencies will be locked in application that uses them

spec/jwt_spec.cr

@@ -20,7 +20,7 @@ describe JWT do
 
     it "decodes and verifies JWT with dynamic key" do
       token = "eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJrMSI6InYxIiwiazIiOiJ2MiJ9.spzfy63YQSKdoM3av9HHvLtWzFjPd1hbch2g3T1-nu4"
-      payload, header = JWT.decode(token, algorithm: JWT::Algorithm::HS256) do |header, payload|
+      payload, header = JWT.decode(token, algorithm: JWT::Algorithm::HS256) do |_header, _payload|
         "SecretKey"
       end
       header.should eq({"typ" => "JWT", "alg" => "HS256"})
@@ -29,7 +29,7 @@ describe JWT do
 
     it "decodes and verifies JWT with dynamic key and auto algorithm" do
       token = "eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJrMSI6InYxIiwiazIiOiJ2MiJ9.spzfy63YQSKdoM3av9HHvLtWzFjPd1hbch2g3T1-nu4"
-      payload, header = JWT.decode(token) do |header, payload|
+      payload, header = JWT.decode(token) do |_header, _payload|
         "SecretKey"
       end
       header.should eq({"typ" => "JWT", "alg" => "HS256"})

src/jwt.cr

@@ -84,7 +84,7 @@ module JWT
     payload_json = Base64.decode_string(encoded_payload)
     payload = JSON.parse(payload_json)
 
-    { header, payload }
+    {header, payload}
   rescue error : Base64::Error
     raise DecodeError.new("Invalid Base64", error)
   rescue error : JSON::ParseException