Generics migration (#237)

* Generics migration

This attempts to migrate this library in the least invasive way by preserving as
much of the original API as possible. It does not change the tests in a
meaningful way nor does it attempt to upgrade any logic that can be simplified
or improved with generics. This is purely an API migration, and still requires a
lot of additional work to be fully ready.

* Fix a few broken tests around serialization

* Add v2 suffix

* Temporarily change mod name for testing

* Rename module to /v2

stacks/arraystack/serialization.go

@@ -5,29 +5,29 @@
 package arraystack
 
 import (
-	"github.com/emirpasic/gods/containers"
+	"github.com/emirpasic/gods/v2/containers"
 )
 
 // Assert Serialization implementation
-var _ containers.JSONSerializer = (*Stack)(nil)
-var _ containers.JSONDeserializer = (*Stack)(nil)
+var _ containers.JSONSerializer = (*Stack[int])(nil)
+var _ containers.JSONDeserializer = (*Stack[int])(nil)
 
 // ToJSON outputs the JSON representation of the stack.
-func (stack *Stack) ToJSON() ([]byte, error) {
+func (stack *Stack[T]) ToJSON() ([]byte, error) {
 	return stack.list.ToJSON()
 }
 
 // FromJSON populates the stack from the input JSON representation.
-func (stack *Stack) FromJSON(data []byte) error {
+func (stack *Stack[T]) FromJSON(data []byte) error {
 	return stack.list.FromJSON(data)
 }
 
 // UnmarshalJSON @implements json.Unmarshaler
-func (stack *Stack) UnmarshalJSON(bytes []byte) error {
+func (stack *Stack[T]) UnmarshalJSON(bytes []byte) error {
 	return stack.FromJSON(bytes)
 }
 
 // MarshalJSON @implements json.Marshaler
-func (stack *Stack) MarshalJSON() ([]byte, error) {
+func (stack *Stack[T]) MarshalJSON() ([]byte, error) {
 	return stack.ToJSON()
 }