Use peerDep rather than plugin param for common APIs.

packages/babel-plugin-transform-parameters/src/index.js

@@ -1,7 +1,7 @@
 import convertFunctionParams from "./params";
 import convertFunctionRest from "./rest";
 
-export default function(babel, options) {
+export default function(api, options) {
   const { loose } = options;
   return {
     visitor: {

packages/babel-plugin-transform-parameters/src/params.js

@@ -1,6 +1,5 @@
 import callDelegate from "@babel/helper-call-delegate";
-import template from "@babel/template";
-import * as t from "@babel/types";
+import { template, types as t } from "@babel/core";
 
 const buildDefaultParam = template(`
   let VARIABLE_NAME =

packages/babel-plugin-transform-parameters/src/rest.js

@@ -1,5 +1,4 @@
-import template from "@babel/template";
-import * as t from "@babel/types";
+import { template, types as t } from "@babel/core";
 
 const buildRest = template(`
   for (var LEN = ARGUMENTS.length,