Fix use of deprecated API in package.js

Fixes use of deprecated API in `package.js` which has been finally removed in Meteor 2.3

Author: StorytellerCZ

package.js

@@ -1,6 +1,6 @@
 Package.describe({
  summary: "Allow injection of arbitrary data to initial Meteor HTML page",
- version: "1.0.4",
+ version: "1.0.5",
  git: "https://github.com/meteorhacks/meteor-inject-initial.git",
  name: "meteorhacks:inject-initial"
 });
@@ -9,33 +9,33 @@ Npm.depends({
  "connect": "2.12.0"
 });
 
-Package.on_use(function (api) {
+Package.onUse(function (api) {
  configurePackage(api);
 api.export('Inject', 'server');
 api.export(['Injected', 'Inject'], 'client');
 });
 
-Package.on_test(function(api) {
+Package.onTest(function(api) {
  configurePackage(api);
  api.use('tinytest', ['client', 'server']);
 
- api.add_files('test/inject-helpers.js', 'server');
- api.add_files('test/inject-public-api.js', 'server');
- api.add_files('test/inject-internal-api.js', 'server');
- api.add_files('test/inject-core.js', 'server');
+ api.addFiles('test/inject-helpers.js', 'server');
+ api.addFiles('test/inject-public-api.js', 'server');
+ api.addFiles('test/inject-internal-api.js', 'server');
+ api.addFiles('test/inject-core.js', 'server');
 
- api.add_files('test/injected-public-api.js', ['server', 'client']);
+ api.addFiles('test/injected-public-api.js', ['server', 'client']);
 });
 
 function configurePackage(api) {
  if(api.versionsFrom) {
- api.versionsFrom('METEOR@0.9.0');
+ api.versionsFrom('METEOR@1.0.0');
  }
 
  api.use(['routepolicy', 'webapp'], 'server');
  api.use(['ejson', 'underscore'], ['client','server']);
 
- api.add_files('lib/inject-server.js', 'server');
- api.add_files('lib/inject-core.js', 'server');
- api.add_files('lib/inject-client.js', 'client');
+ api.addFiles('lib/inject-server.js', 'server');
+ api.addFiles('lib/inject-core.js', 'server');
+ api.addFiles('lib/inject-client.js', 'client');
 }