refactor: split edge into separate config, its own launcher

Also, moves configuration provides to inversify as well. The split right
now is pretty basic, just doing the minimium to move the
webview-specific code out of the browser launcher. With microsoft#267 they will
diverge a little more.

There's a decent amount of churn around configs here. But the way we
have them set up they're well typed-checked, so it's fairly safe.

Fixes microsoft#266

package.json

@@ -58,7 +58,7 @@
     "reflect-metadata": "^0.1.13",
     "source-map": "^0.7.3",
     "split2": "^3.1.1",
-    "typescript": "^3.7.4",
+    "typescript": "^3.8.1-rc",
     "vscode-nls": "^4.1.1",
     "ws": "^7.0.1"
   },

src/binder.ts

@@ -166,7 +166,11 @@ export class Binder implements IDisposable {
     provideLaunchParams(this._rootServices, params);
     this._rootServices.get<ILogger>(ILogger).setup(resolveLoggerOptions(dap, params.trace));
 
-    const cts = CancellationTokenSource.withTimeout(params.timeout);
+    const cts =
+      params.timeout > 0
+        ? CancellationTokenSource.withTimeout(params.timeout)
+        : new CancellationTokenSource();
+
     if (params.rootPath) params.rootPath = urlUtils.platformPathToPreferredCase(params.rootPath);
     this._launchParams = params;
     let results = await Promise.all(