Update version numbers for release 0.5.0-alpha.3

Author: sharwell

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "antlr4ts-root",
-  "version": "0.5.0-dev",
+  "version": "0.5.0-alpha.3",
   "description": "Root project for ANTLR 4 runtime for Typescript",
   "private": true,
   "main": "index.js",

package.json

@@ -1,6 +1,6 @@
 {
   "name": "antlr4ts",
-  "version": "0.5.0-dev",
+  "version": "0.5.0-alpha.3",
   "description": "ANTLR 4 runtime for JavaScript written in Typescript",
   "main": "index.js",
   "scripts": {},

target/src/package.json

@@ -1,6 +1,6 @@
 {
   "name": "antlr4ts-cli",
-  "version": "0.5.0-dev",
+  "version": "0.5.0-alpha.3",
   "preferGlobal": true,
   "description": "ANTLR 4 command line tool for TypeScript",
   "files": [