chore(deps): update dependency karma-coverage-istanbul-reporter to v2.1.0

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
karma-coverage-istanbul-reporter	devDependencies	minor	2.0.6 -> 2.1.0

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Release Notes

mattlewis92/karma-coverage-istanbul-reporter

### [`v2.1.0`](https://togithub.com/mattlewis92/karma-coverage-istanbul-reporter/blob/master/CHANGELOG.md#​210httpsgithubcommattlewis92karma-coverage-istanbul-reportercomparev206v210-2019-07-24) [Compare Source](https://togithub.com/mattlewis92/karma-coverage-istanbul-reporter/compare/v2.0.6...v2.1.0) ##### Features - **config:** support istanbul-api instrumentation configuration ([c4f7a9c](https://togithub.com/mattlewis92/karma-coverage-istanbul-reporter/commit/c4f7a9c)), closes [#​73](https://togithub.com/mattlewis92/karma-coverage-istanbul-reporter/issues/73) #### [2.0.6](https://togithub.com/mattlewis92/karma-coverage-istanbul-reporter/compare/v2.0.5...v2.0.6) (2019-07-20) ##### Bug Fixes - get source code from sourceMapStore on write report ([619d90d](https://togithub.com/mattlewis92/karma-coverage-istanbul-reporter/commit/619d90d)), closes [#​72](https://togithub.com/mattlewis92/karma-coverage-istanbul-reporter/issues/72) #### [2.0.5](https://togithub.com/mattlewis92/karma-coverage-istanbul-reporter/compare/v2.0.4...v2.0.5) (2019-02-17) ##### Bug Fixes - correctly strip source file prefixes when no webpack.context is defined ([3c48bf8](https://togithub.com/mattlewis92/karma-coverage-istanbul-reporter/commit/3c48bf8)) - don't double-report files with mixed slashes in their names on windows ([38087c2](https://togithub.com/mattlewis92/karma-coverage-istanbul-reporter/commit/38087c2)) #### [2.0.4](https://togithub.com/mattlewis92/karma-coverage-istanbul-reporter/compare/v2.0.3...v2.0.4) (2018-09-08) ##### Bug Fixes - handle source roots being undefined on windows ([8eba911](https://togithub.com/mattlewis92/karma-coverage-istanbul-reporter/commit/8eba911)), closes [#​55](https://togithub.com/mattlewis92/karma-coverage-istanbul-reporter/issues/55) #### [2.0.3](https://togithub.com/mattlewis92/karma-coverage-istanbul-reporter/compare/v2.0.2...v2.0.3) (2018-09-01) ##### Bug Fixes - update istanbuljs to 2.x ([a835e22](https://togithub.com/mattlewis92/karma-coverage-istanbul-reporter/commit/a835e22)), closes [#​52](https://togithub.com/mattlewis92/karma-coverage-istanbul-reporter/issues/52) - use correct source file path separators on windows ([938e93c](https://togithub.com/mattlewis92/karma-coverage-istanbul-reporter/commit/938e93c)), closes [#​47](https://togithub.com/mattlewis92/karma-coverage-istanbul-reporter/issues/47) #### [2.0.2](https://togithub.com/mattlewis92/karma-coverage-istanbul-reporter/compare/v2.0.1...v2.0.2) (2018-08-24) ##### Bug Fixes - files with no coverage should be preserved by default ([#​54](https://togithub.com/mattlewis92/karma-coverage-istanbul-reporter/issues/54)) ([e5a5545](https://togithub.com/mattlewis92/karma-coverage-istanbul-reporter/commit/e5a5545)), closes [#​53](https://togithub.com/mattlewis92/karma-coverage-istanbul-reporter/issues/53) #### [2.0.1](https://togithub.com/mattlewis92/karma-coverage-istanbul-reporter/compare/v2.0.0...v2.0.1) (2018-05-23) ##### Bug Fixes - don't log errors twice when using multiple reporters ([a17b6ca](https://togithub.com/mattlewis92/karma-coverage-istanbul-reporter/commit/a17b6ca)), closes [#​44](https://togithub.com/mattlewis92/karma-coverage-istanbul-reporter/issues/44)

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