fix: Resolve TypeScript errors

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

client/node_modules/level-supports/index.js

@@ -0,0 +1,35 @@
+'use strict'
+
+// For (old) browser support
+var xtend = require('xtend')
+var assign = require('xtend/mutable')
+
+module.exports = function supports () {
+  var manifest = xtend.apply(null, arguments)
+
+  return assign(manifest, {
+    // Features of abstract-leveldown
+    bufferKeys: manifest.bufferKeys || false,
+    snapshots: manifest.snapshots || false,
+    permanence: manifest.permanence || false,
+    seek: manifest.seek || false,
+    clear: manifest.clear || false,
+
+    // Features of abstract-leveldown that levelup doesn't have
+    status: manifest.status || false,
+
+    // Features of disk-based implementations
+    createIfMissing: manifest.createIfMissing || false,
+    errorIfExists: manifest.errorIfExists || false,
+
+    // Features of level(up) that abstract-leveldown doesn't have yet
+    deferredOpen: manifest.deferredOpen || false,
+    openCallback: manifest.openCallback || false,
+    promises: manifest.promises || false,
+    streams: manifest.streams || false,
+    encodings: manifest.encodings || false,
+
+    // Methods that are not part of abstract-leveldown or levelup
+    additionalMethods: xtend(manifest.additionalMethods)
+  })
+}