fix: Resolve TypeScript errors

Signed-off-by: Hermes Agent <hermes@nosuchhost>

client/node_modules/level-supports/test/shape.js

@@ -0,0 +1,22 @@
+'use strict'
+
+var hasOwnProperty = Object.prototype.hasOwnProperty
+
+module.exports = function shape (t, manifest) {
+  t.ok(isObject(manifest), 'manifest is object')
+  t.ok(isObject(manifest.additionalMethods), 'additionalMethods is object')
+
+  for (var k in manifest) {
+    if (!hasOwnProperty.call(manifest, k)) continue
+
+    if (manifest[k]) {
+      t.ok(manifest[k], 'truthy: ' + k)
+    } else {
+      t.is(manifest[k], false, 'false: ' + k)
+    }
+  }
+}
+
+function isObject (o) {
+  return typeof o === 'object' && o !== null
+}