chore(deps): update dependency rollup to v2.6.1

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
rollup (source)	devDependencies	patch	2.6.0 -> 2.6.1

---

Release Notes

rollup/rollup

v2.6.1

Compare Source

2020-04-12

Bug Fixes

• Close watch mode when stdin closes in a non-TTY environment (#​3493)

Pull Requests

• #​3493: Ensure --watch mode exits correctly when stdin is closed (@​jakesgordon)

---

Renovate configuration

📅 Schedule: "before 3am every weekend" (UTC).

🚦 Automerge: Enabled.

♻️ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

---

• If you want to rebase/retry this PR, check this box

---

This PR has been generated by WhiteSource Renovate. View repository job log here.

[codecov]

Codecov Report

Merging #378 into master will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##            master      #378   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            5         5           
  Lines           19        19           
  Branches         4         4           
=========================================
  Hits            19        19           

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 2f15553...a202439. Read the comment docs.