update typescript to support optional chaining

Author: David First

CHANGELOG.md

@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 ## [unreleased]
 
+## [2.1.5-dev.1] - 2020-01-08
+
+- [#2231](https://github.com/teambit/bit/issues/2231) update typescript to support optional chaining
+
 ## [2.1.4] - 2019-11-24
 
 - [#2140](https://github.com/teambit/bit/issues/2140) support `import { x as y }` syntax

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "bit-javascript",
-  "version": "2.1.4",
+  "version": "2.1.5-dev.1",
   "scripts": {
     "lint": "tsc && eslint \"src/**/*.ts\"",
     "lint-circle": "eslint \"src/**/*.ts\" --format junit -o junit/eslint-results.xml",
@@ -70,7 +70,7 @@
     "sass-lookup": "^3.0.0",
     "stylable": "5.2.2",
     "stylus-lookup": "^3.0.2",
-    "typescript": "3.6.3",
+    "typescript": "3.7.4",
     "user-home": "^2.0.0",
     "vue-template-compiler": "^2.5.13"
   },