package: add new npm scripts, use esbuild to minify

This adjusts the build scripts to add the new scripts required to build.
The new additions are:
- esbuild-base: the core esbuild command for bundling the extension
- esbuild-watch: the watch version used for development
- package: package only step
- dev-package: package the extension with the development version id

This updates the `vscode:prepublish` script to minify the extension
prior to building the extension package.

`createDevPackage` is left as a compatibility option, however, it does
not work on all platforms (i.e. Windows) due to the use of bash specific
scripting.

Author: compnerd

Editors/vscode/package.json

@@ -19,11 +19,14 @@
         "onLanguage:objective-c",
         "onLanguage:objective-cpp"
     ],
-    "main": "./out/extension",
+    "main": "./out/main",
     "scripts": {
-        "vscode:prepublish": "npm run compile",
-        "compile": "tsc -p ./",
-        "watch": "tsc -watch -p ./",
+        "vscode:prepublish": "npm run -S esbuild-base -- --minify",
+        "esbuild-base": "esbuild ./src/extension.ts --bundle --outfile=out/main.js --external:vscode --format=cjs --platform=node",
+        "esbuild": "npm run -S esbuild-base -- --sourcemap",
+        "esbuild-watch": "npm run -S esbuild-base -- --sourcemap --watch",
+        "package": "vsce package",
+        "dev-package": "vsce package -o sourcekit-lsp-development.vsix",
         "createDevPackage": "npm install && ./node_modules/.bin/vsce package -o ./out/sourcekit-lsp-vscode-dev.vsix"
     },
     "dependencies": {