Generates sourcemap by default spec failing

[snuggs]

Description

On Jun. 6th 2016 @Rich-Harris dependency bumped source-map package from 0.5.3 → 0.5.6.
6192dc2#diff-b9cfc7f2cdf78a7f4b91a753d10865a2L47

This included a regression failure corrected by Mozilla in the 0.5.6 release.
mozilla/source-map#236

In particular the following diff:
https://github.com/mozilla/source-map/pull/236/files#diff-72d90d7b160cfdc50eee99b2a33c871cL320

Which fixed a regression failure of the following bug:
https://bugzilla.mozilla.org/show_bug.cgi?id=889492

Expected Behavior

Sourcemap name resolution regression fix.
Test suite success. 14 passing, 0 failing

Current Behavior

null name expectation.
Test suite failure. 13 passing, 1 failing

Possible Solution

1. 🔧 change test to reconcile dependency bump of [email protected]
2. retrograde to [email protected]
3. `¯_(ツ)_/¯

Steps to Reproduce (for bugs)

$ npm install && npm test Results in the following test failure.
https://github.com/rollup/rollup-plugin-babel/blob/master/test/test.js#L104

Full Stack Trace

13 passing (1s)
  1 failing

  1) rollup-plugin-babel generates sourcemap by default:

      AssertionError: { source: '/Users/rashaunstovall/rollup-plugin-babel/test/samples/class/main.js',
  line: 3,
  column: 10,
  name: 'log' } deepEqual { source: '/Users/rashaunstovall/rollup-plugin-babel/test/samples/class/main.js',
  line: 3,
  column: 10,
  name: null }
      + expected - actual

       {
         "column": 10
         "line": 3
      -  "name": "log"
      +  "name": [null]
         "source": "/Users/rashaunstovall/rollup-plugin-babel/test/samples/class/main.js"
       }

      at test/test.js:116:11

npm ERR! Test failed.  See above for more details.

Your Environment

• Version used: $ npm --version # 3.8.3 & $ node --version # v5.10.1
• Operating System and version (desktop or mobile): OSX

[snuggs]

I believe this was fixed in a recent PR. Possibly in Rollup. @Rich-Harris can you confirm? If so i'll close.

[Rich-Harris]

closing now that #82 was merged – thanks