Fixed issue on type.Delete.encode and added version to the bundle

Author: Josema

package.json

@@ -1,6 +1,6 @@
 {
     "name": "dop",
-    "version": "1.0.0",
+    "version": "1.0.1",
     "main": "dist/dop.js",
     "browser": "dist/dop.umd.js",
     "license": "MIT",
@@ -33,6 +33,7 @@
     "dependencies": {},
     "devDependencies": {
         "@rollup/plugin-buble": "^0.20.0",
+        "@rollup/plugin-json": "^4.0.1",
         "ava": "^2.4.0",
         "ejson": "^2.2.0",
         "esm": "^3.2.25",

rollup.config.js

@@ -1,6 +1,7 @@
 import pkg from './package.json'
 import minify from 'rollup-plugin-babel-minify'
 import buble from '@rollup/plugin-buble'
+import json from '@rollup/plugin-json'
 
 export default [
     // dop.js
@@ -11,17 +12,13 @@ export default [
             { file: pkg.main, format: 'cjs' }
             // { file: pkg.module, format: 'es' }
         ],
-        plugins: [buble()]
+        plugins: [json(), buble()]
     },
 
     // dop.umd.js
     {
         input: 'src/index',
-        output: {
-            name: 'dop',
-            file: pkg.browser,
-            format: 'umd'
-        },
-        plugins: [buble(), minify({ comments: false })]
+        output: { name: 'dop', file: pkg.browser, format: 'umd' },
+        plugins: [json(), buble(), minify({ comments: false })]
     }
 ]

src/index.js

@@ -1,3 +1,4 @@
+import { version } from '../package.json'
 import merge from './util/merge'
 import converter from './util/converter'
 import { isFunction } from './util/is'
@@ -26,6 +27,7 @@ function factory() {
     const createNode = createNodeFactory({ encoders, decoders })
 
     return {
+        version,
         factory,
         merge,
         encode,

src/types/Delete.js

@@ -19,7 +19,7 @@ Delete.patch = function({ origin, destiny, prop, oldValue, had_prop }) {
 }
 
 Delete.encode = function({ value }) {
-    if (value instanceof Delete) {
+    if (value instanceof Delete || value === Delete) {
         return { [DELETE_KEY]: 0 } // we don't go deeper
     } else if (isValidToDecode({ value })) {
         return { [ESCAPE_KEY]: value } // we don't go deeper

test/api.js

@@ -3,6 +3,7 @@ import dop from '../'
 import { createNode } from '../'
 
 const exported = [
+    'version',
     'factory',
     'merge',
     'encode',