Use pce 2.0.6

[sajith]

Some small changes to use pce 2.0.5 2.0.6, which was just tagged.

[coveralls]

Pull Request Test Coverage Report for Build 7495284850

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.009%) to 37.778%

---

Totals
Change from base Build 6239647665:	-0.009%
Covered Lines:	517
Relevant Lines:	1225

---

💛 - Coveralls