feat: add googlepubsub bindings

Adds support for Google Cloud Pub/Sub bindings.

See: asyncapi/bindings#141

spec/asyncapi.md

@@ -361,7 +361,7 @@ An object representing a message broker, a server or any other kind of computer
 Field Name | Type | Description
 ---|:---:|---
 <a name="serverObjectUrl"></a>url | `string` | **REQUIRED**. A URL to the target host.  This URL supports Server Variables and MAY be relative, to indicate that the host location is relative to the location where the AsyncAPI document is being served. Variable substitutions will be made when a variable is named in `{`braces`}`.
-<a name="serverObjectProtocol"></a>protocol | `string` | **REQUIRED**. The protocol this URL supports for connection. Supported protocol include, but are not limited to: `amqp`, `amqps`, `http`, `https`, `ibmmq`, `jms`, `kafka`, `kafka-secure`, `anypointmq`, `mqtt`, `secure-mqtt`, `solace`, `stomp`, `stomps`, `ws`, `wss`, `mercure`.
+<a name="serverObjectProtocol"></a>protocol | `string` | **REQUIRED**. The protocol this URL supports for connection. Supported protocol include, but are not limited to: `amqp`, `amqps`, `http`, `https`, `ibmmq`, `jms`, `kafka`, `kafka-secure`, `anypointmq`, `mqtt`, `secure-mqtt`, `solace`, `stomp`, `stomps`, `ws`, `wss`, `mercure`, `googlepubsub`.
 <a name="serverObjectProtocolVersion"></a>protocolVersion | `string` | The version of the protocol used for connection. For instance: AMQP `0.9.1`, HTTP `2.0`, Kafka `1.0.0`, etc.
 <a name="serverObjectDescription"></a>description | `string` | An optional string describing the host designated by the URL. [CommonMark syntax](https://spec.commonmark.org/) MAY be used for rich text representation.
 <a name="serverObjectVariables"></a>variables | Map[`string`, [Server Variable Object](#serverVariableObject) \| [Reference Object](#referenceObject)]] | A map between a variable name and its value.  The value is used for substitution in the server's URL template.
@@ -980,6 +980,7 @@ Field Name | Type | Description
 <a name="serverBindingsObjectRedis"></a>`redis` | [Redis Server Binding](https://github.com/asyncapi/bindings/blob/master/redis#server) | Protocol-specific information for a Redis server.
 <a name="serverBindingsObjectMercure"></a>`mercure` | [Mercure Server Binding](https://github.com/asyncapi/bindings/blob/master/mercure#server) | Protocol-specific information for a Mercure server.
 <a name="serverBindingsObjectIBMMQ"></a>`ibmmq` | [IBM MQ Server Binding](https://github.com/asyncapi/bindings/blob/master/ibmmq#server-binding-object) | Protocol-specific information for an IBM MQ server.
+<a name="serverBindingsObjectGooglePubSub"></a>`googlepubsub` | [Google Cloud Pub/Sub Server Binding](https://github.com/asyncapi/bindings/blob/master/googlepubsub#server) | Protocol-specific information for a Google Cloud Pub/Sub server.
 
 This object MAY be extended with [Specification Extensions](#specificationExtensions).
 
@@ -1010,6 +1011,7 @@ Field Name | Type | Description
 <a name="channelBindingsObjectRedis"></a>`redis` | [Redis Channel Binding](https://github.com/asyncapi/bindings/blob/master/redis#channel) | Protocol-specific information for a Redis channel.
 <a name="channelBindingsObjectMercure"></a>`mercure` | [Mercure Channel Binding](https://github.com/asyncapi/bindings/blob/master/mercure#channel) | Protocol-specific information for a Mercure channel.
 <a name="channelBindingsObjectIBMMQ"></a>`ibmmq` | [IBM MQ Channel Binding](https://github.com/asyncapi/bindings/tree/master/ibmmq#channel-binding-object) | Protocol-specific information for an IBM MQ channel.
+<a name="channelBindingsObjectGooglePubSub"></a>`googlepubsub` | [Google Cloud Pub/Sub Channel Binding](https://github.com/asyncapi/bindings/tree/master/googlepubsub#channel) | Protocol-specific information for a Google Cloud Pub/Sub channel.
 
 This object MAY be extended with [Specification Extensions](#specificationExtensions).
 
@@ -1039,6 +1041,7 @@ Field Name | Type | Description
 <a name="operationBindingsObjectSTOMP"></a>`stomp` | [STOMP Operation Binding](https://github.com/asyncapi/bindings/blob/master/stomp/README.md#operation) | Protocol-specific information for a STOMP operation.
 <a name="operationBindingsObjectRedis"></a>`redis` | [Redis Operation Binding](https://github.com/asyncapi/bindings/blob/master/redis#operation) | Protocol-specific information for a Redis operation.
 <a name="operationBindingsObjectMercure"></a>`mercure` | [Mercure Operation Binding](https://github.com/asyncapi/bindings/blob/master/mercure#operation) | Protocol-specific information for a Mercure operation.
+<a name="operationBindingsObjectGooglePubSub"></a>`googlepubsub` | [Google Cloud Pub/Sub Operation Binding](https://github.com/asyncapi/bindings/blob/master/mercure#operation) | Protocol-specific information for a Google Cloud Pub/Sub operation.
 
 This object MAY be extended with [Specification Extensions](#specificationExtensions).
 
@@ -1070,6 +1073,7 @@ Field Name | Type | Description
 <a name="messageBindingsObjectRedis"></a>`redis` | [Redis Message Binding](https://github.com/asyncapi/bindings/blob/master/redis#message) | Protocol-specific information for a Redis message.
 <a name="messageBindingsObjectMercure"></a>`mercure` | [Mercure Message Binding](https://github.com/asyncapi/bindings/blob/master/mercure#message) | Protocol-specific information for a Mercure message.
 <a name="messageBindingsObjectIBMMQ"></a>`ibmmq` | [IBM MQ Message Binding](https://github.com/asyncapi/bindings/tree/master/ibmmq#message-binding-object) | Protocol-specific information for an IBM MQ message.
+<a name="messageBindingsObjectGooglePubSub"></a>`googlepubsub` | [Google Cloud Pub/Sub Message Binding](https://github.com/asyncapi/bindings/tree/master/googlepubsub#message) | Protocol-specific information for a Google Cloud Pub/Sub message.
 
 This object MAY be extended with [Specification Extensions](#specificationExtensions).