Rename all proposal plugins to -proposal- from -transform- (#6570)

packages/babel-plugin-proposal-function-bind/test/fixtures/function-bind/complex-call/expected.js

@@ -0,0 +1,10 @@
+var _context;
+
+import { map, takeWhile, forEach } from "iterlib";
+(_context = (_context = (_context = getPlayers(), map).call(_context, function (x) {
+  return x.character();
+}), takeWhile).call(_context, function (x) {
+  return x.strength > 100;
+}), forEach).call(_context, function (x) {
+  return console.log(x);
+});