Add support to Interface based model (#195)

* Add interfaces and plain objects based model

Signed-off-by: handreyrc <handrey.cunha@gmail.com>

* fix lodash dependency and remove debug message

Signed-off-by: handreyrc <handrey.cunha@gmail.com>

* do not break the SDK for those relying on classes

Signed-off-by: handreyrc <handrey.cunha@gmail.com>

* fix wrong name and version

Signed-off-by: handreyrc <handrey.cunha@gmail.com>

---------

Signed-off-by: handreyrc <handrey.cunha@gmail.com>

Author: handreyrc

README.md

@@ -40,13 +40,13 @@ npm install && npm run build && npm run test
 For the latest stable version:
 
 ```sh
-npm i @severlessworkflow/sdk-typescript
+npm i @serverlessworkflow/sdk-typescript
 ```
 
 #### Create Workflow using builder API
 
 ```typescript
-import { workflowBuilder, injectstateBuilder, Specification } from '@severlessworkflow/sdk-typescript';
+import { workflowBuilder, injectstateBuilder, Specification } from '@serverlessworkflow/sdk-typescript';
 
 const workflow: Specification.Workflow = workflowBuilder()
   .id("helloworld")
@@ -69,7 +69,7 @@ const workflow: Specification.Workflow = workflowBuilder()
 #### Create Workflow from JSON/YAML source
 
 ```typescript
-import { Specification, Workflow } from '@severlessworkflow/sdk-typescript';
+import { Specification, Workflow } from '@serverlessworkflow/sdk-typescript';
 
 const source = `id: helloworld
 version: '1.0'
@@ -93,7 +93,7 @@ Where `source` can be in both JSON or YAML format.
 Having the following workflow instance:
 
 ```typescript
-import { workflowBuilder, injectstateBuilder, Specification } from '@severlessworkflow/sdk-typescript';
+import { workflowBuilder, injectstateBuilder, Specification } from '@serverlessworkflow/sdk-typescript';
 
 const workflow: Specification.Workflow = workflowBuilder()
   .id("helloworld")
@@ -139,7 +139,7 @@ The sdk provides a way to validate if a workflow object is compliant with the se
 - `validate(): boolean`
 
 ```typescript
-import {WorkflowValidator, Specification} from '@severlessworkflow/sdk-typescript';
+import {WorkflowValidator, Specification} from '@serverlessworkflow/sdk-typescript';
 import {Workflow} from "./workflow";
 
 const workflow = {
@@ -171,7 +171,7 @@ You can also validate parts of a workflow using `validators`:
 
 ```typescript
 import { ValidateFunction } from 'ajv';
-import { validators, Specification } from '@severlessworkflow/sdk-typescript';
+import { validators, Specification } from '@serverlessworkflow/sdk-typescript';
 
 const injectionState: Specification.Injectstate = workflow.states[0];
 const injectionStateValidator: ValidateFunction<Specification.Injectstate> = validators.get('Injectstate');

examples/node/index.ts

@@ -15,7 +15,7 @@
  */
 import { injectstateBuilder, Specification, workflowBuilder } from '../../dist';
 
-const workflow: Specification.Workflow = workflowBuilder()
+const workflow: Specification.IWorkflow = workflowBuilder()
   .id('helloworld')
   .version('1.0')
   .name('Hello World Workflow')