fix: patch bug in stack-utils npm package

Lockdown breaks Ava under certain versions of NodeJS.  It turns out to be due to
a bug in the `stack-utils` npm package with trips over the override mistake.
I've filed an issue with the maintainer of that package, but in the meantime
this patch deals with the problem.

See tapjs/stack-utils#70

patches/stack-utils+2.0.5.patch

@@ -0,0 +1,22 @@
+diff --git a/node_modules/stack-utils/index.js b/node_modules/stack-utils/index.js
+index ed14bd3..ad9eeb1 100644
+--- a/node_modules/stack-utils/index.js
++++ b/node_modules/stack-utils/index.js
+@@ -161,7 +161,7 @@ class StackUtils {
+     setFile(res, site.getFileName(), this._cwd);
+
+     if (site.isConstructor()) {
+-      res.constructor = true;
++      Object.defineProperty(res, 'constructor', { value: true });
+     }
+
+     if (site.isEval()) {
+@@ -260,7 +260,7 @@ class StackUtils {
+     setFile(res, file, this._cwd);
+
+     if (ctor) {
+-      res.constructor = true;
++      Object.defineProperty(res, 'constructor', { value: true });
+     }
+
+     if (evalOrigin) {