修复可选属性链式语法

dist/index.es.js

@@ -13,6 +13,7 @@ async function compile(source, debug = false) {
 		presets: [
 			['@babel/env', {}]
 		],
+		plugins: ["@babel/proposal-optional-chaining"],
 		babelrc: false,
 		sourceMaps: debug,
 	});

dist/index.js

@@ -19,6 +19,7 @@ async function compile(source, debug = false) {
 		presets: [
 			['@babel/env', {}]
 		],
+		plugins: ["@babel/proposal-optional-chaining"],
 		babelrc: false,
 		sourceMaps: debug,
 	});

dist/index.umd.js

@@ -17,6 +17,7 @@
 			presets: [
 				['@babel/env', {}]
 			],
+			plugins: ["@babel/proposal-optional-chaining"],
 			babelrc: false,
 			sourceMaps: debug,
 		});

package.json

@@ -4,8 +4,9 @@
 	"main": "dist/index.js",
 	"license": "MIT",
 	"dependencies": {
-		"@babel/core": "^7.7.4",
-		"@babel/preset-env": "^7.7.4",
+		"@babel/core": "^7.8.6",
+		"@babel/plugin-proposal-optional-chaining": "^7.8.3",
+		"@babel/preset-env": "^7.8.6",
 		"gensync": "^1.0.0-beta.1",
 		"uglify-js": "^3.7.1",
 		"zeroing-code-divider": "http://gitlab2.dui88.com/laoqifeng/zeroing-code-divider.git",

src/code-process.js

@@ -11,6 +11,7 @@ export async function compile(source, debug = false) {
 		presets: [
 			['@babel/env', {}]
 		],
+		plugins: ["@babel/proposal-optional-chaining"],
 		babelrc: false,
 		sourceMaps: debug,
 	});