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]

Pull Request Test Coverage Report for Build 108

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 100.0%

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Totals
Change from base Build 106:	0.0%
Covered Lines:	9
Relevant Lines:	9

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💛 - Coveralls