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

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

@@ -0,0 +1,29 @@
+var operations = [];
+
+var lib = {};
+
+['f', 'g', 'h'].forEach(function (key) {
+  var func = function () {
+    return operations.push("lib." + key + "()");
+  };
+  Object.defineProperty(lib, key, {
+    get: function () {
+      operations.push("get lib." + key);
+      return func;
+    }
+  });
+});
+
+({prop:'value'})
+::lib.f()
+::lib.g()
+::lib.h();
+
+assert.deepEqual(operations, [
+  'get lib.f',
+  'lib.f()',
+  'get lib.g',
+  'lib.g()',
+  'get lib.h',
+  'lib.h()'
+]);