[bugfix] Fix Swagger spec and add test script (#2698)

* Add Swagger spec test script

* Fix Swagger spec errors not related to statuses with polls

* Add API tests that post a status with a poll

* Fix creating a status with a poll from form params

* Fix Swagger spec errors related to statuses with polls (this is the last error)

* Fix Swagger spec warnings not related to unused definitions

* Suppress a duplicate list update params definition that was somehow causing wrong param names

* Add Swagger test to CI

- updates Drone config
- vendorizes go-swagger
- fixes a file extension issue that caused the test script to generate JSON instead of YAML with the vendorized version

* Put `Sample: ` on its own line everywhere

* Remove unused id param from emojiCategoriesGet

* Add 5 more pairs of profile fields to account update API Swagger

* Remove Swagger prefix from dummy fields

It makes the generated code look weird

* Manually annotate params for statusCreate operation

* Fix all remaining Swagger spec warnings

- Change some models into operation parameters
- Ignore models that already correspond to manually documented operation parameters but can't be trivially changed (those with file fields)

* Documented that creating a status with scheduled_at isn't implemented yet

* sign drone.yml

* Fix filter API Swagger errors

* fixup! Fix filter API Swagger errors

---------

Co-authored-by: tobi <tobi.smethurst@protonmail.com>

vendor/github.com/go-openapi/spec/errors.go

@@ -0,0 +1,19 @@
+package spec
+
+import "errors"
+
+// Error codes
+var (
+	// ErrUnknownTypeForReference indicates that a resolved reference was found in an unsupported container type
+	ErrUnknownTypeForReference = errors.New("unknown type for the resolved reference")
+
+	// ErrResolveRefNeedsAPointer indicates that a $ref target must be a valid JSON pointer
+	ErrResolveRefNeedsAPointer = errors.New("resolve ref: target needs to be a pointer")
+
+	// ErrDerefUnsupportedType indicates that a resolved reference was found in an unsupported container type.
+	// At the moment, $ref are supported only inside: schemas, parameters, responses, path items
+	ErrDerefUnsupportedType = errors.New("deref: unsupported type")
+
+	// ErrExpandUnsupportedType indicates that $ref expansion is attempted on some invalid type
+	ErrExpandUnsupportedType = errors.New("expand: unsupported type. Input should be of type *Parameter or *Response")
+)