vendor tiny subset of unmaintained recompose

the functions we use haven't changed in almost 10 years,
and are only a few lines

we should probably lose them eventually, but easier to vendor them first

jsx/src/util/_recompose.js

@@ -0,0 +1,35 @@
+// extracted tiny subset we use from react-recompose
+// we probably don't need these at all,
+// but vendor before refactoring
+
+// https://github.com/acdlite/recompose
+// License: MIT
+// Copyright (c) 2015-2018 Andrew Clark
+
+import { createElement } from "react";
+
+function createFactory(type) {
+  return createElement.bind(null, type);
+}
+
+export const compose = (...funcs) =>
+  funcs.reduce(
+    (a, b) =>
+      (...args) =>
+        a(b(...args)),
+    (arg) => arg,
+  );
+
+const mapProps = (propsMapper) => (BaseComponent) => {
+  const factory = createFactory(BaseComponent);
+  const MapProps = (props) => factory(propsMapper(props));
+  return MapProps;
+};
+
+export const withProps = (input) => {
+  const hoc = mapProps((props) => ({
+    ...props,
+    ...(typeof input === "function" ? input(props) : input),
+  }));
+  return hoc;
+};