Update dependency rollup to v1.27.13

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
rollup	devDependencies	patch	1.27.11 -> 1.27.13

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Release Notes

rollup/rollup

v1.27.13

Compare Source

2019-12-14

Bug Fixes

• Do not truncate environment variable values at the first colon when using the --environment option (#​3283)

Pull Requests

• #​3283: Allow environment variables to contain colons (@​tlaverdure)

v1.27.12

Compare Source

2019-12-13

Bug Fixes

• Prevent invalid AMD or SystemJS code when accessing import.meta (#​3282)

Pull Requests

• #​3282: Always make "module" available for SystemJS and AMD formats if import.meta is accessed directly (@​lukastaegert)

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