Update dependency coveralls to v3.1.0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
coveralls	devDependencies	minor	3.0.14 -> 3.1.0

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Release Notes

nickmerwin/node-coveralls

v3.1.0

Compare Source

• Handle service_job_number for parallelism in Travis and CircleCI (#​290) 705c3b5
• Update sinon to v7.5.0. (#​288) eb6dc35

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This is a minor release due to the change in behavior for CircleCI, which now uses the Workflow ID to merge parallel coverage jobs:

    options.service_number = process.env.CIRCLE_WORKFLOW_ID;
    options.service_job_number = process.env.CIRCLE_BUILD_NUM;

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[coveralls]

Coverage remained the same at 100.0% when pulling c0d5c69 on renovate/coveralls-3.x into 6ab22df on master.

[codecov-io]

Codecov Report

Merging #27 into master will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##            master       #27   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            5         5           
  Lines           36        36           
=========================================
  Hits            36        36           

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