Update dependency grunt-qunit-istanbul to v1

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
grunt-qunit-istanbul	devDependencies	major	0.4.7 -> 1.1.0

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Release Notes

asciidisco/grunt-qunit-istanbul

### [`v1.1.0`](https://togithub.com/asciidisco/grunt-qunit-istanbul/compare/v1.0.0...1.1.0) [Compare Source](https://togithub.com/asciidisco/grunt-qunit-istanbul/compare/v1.0.0...1.1.0) ### [`v1.0.0`](https://togithub.com/asciidisco/grunt-qunit-istanbul/compare/0.6.0...v1.0.0) [Compare Source](https://togithub.com/asciidisco/grunt-qunit-istanbul/compare/0.6.0...v1.0.0) ### [`v0.6.0`](https://togithub.com/asciidisco/grunt-qunit-istanbul/compare/e152e39a7a30097af10048604a55b5e2741154cb...0.6.0) [Compare Source](https://togithub.com/asciidisco/grunt-qunit-istanbul/compare/e152e39a7a30097af10048604a55b5e2741154cb...0.6.0) ### [`v0.5.0`](https://togithub.com/asciidisco/grunt-qunit-istanbul/compare/6e64c21f5a76bb85cfdfc6ce746e0dbfbe6ee9a0...e152e39a7a30097af10048604a55b5e2741154cb) [Compare Source](https://togithub.com/asciidisco/grunt-qunit-istanbul/compare/6e64c21f5a76bb85cfdfc6ce746e0dbfbe6ee9a0...e152e39a7a30097af10048604a55b5e2741154cb)

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