Import lodash into converter.ts (#353)
Import lodash into converter.ts (#353)

This missing import was breaking the PR builds. Lodash is already imported in other files.
dominic31/typedoc,TypeStrong/typedoc,PolymerLabs/typedoc,PolymerLabs/typedoc,sebastian-lenz/typedoc,sebastian-lenz/typedoc,dominic31/typedoc,TypeStrong/typedoc,sebastian-lenz/typedoc,TypeStrong/typedoc,dominic31/typedoc,PolymerLabs/typedoc