fix npm dependencies.

the es5-shim version was missing from the registry, and the phantomjs
package didn't satisfy mocha-phantomjs's peerDependency.

I have no clue why this changed.

Fixes #89
Update magicpen to 3.0.7.
5.0.0-beta23
Add a bit more color to inspection output
5.0.0-beta24
Update istanbul to 0.3.5 and use --include-all-sources.
Assertion.standardErrorMessage: Support magicpen instances in this.args
Test: Fixed typo in describe.
Let magicpen handle output format when running in mocha phantomjs
5.0.0-beta25
Optimized hot paths
5.0.0-beta26
Only serialize error message on nesting level zero
5.0.0-beta27
5.0.0-beta28
Update magicpen to 3.1.0.
5.0.0-beta29
Update magicpen to 3.1.1.
5.0.0-beta30
Update magicpen to 3.1.2, drop accidentally introduced ^ in version spec.