update dependencies at 20180718020208

[taichi]

Updating Dependencies

Name	Updating	Latest	devDependencies
ava	0.22.0	0.25.0	*
babel-core	6.26.0...6.26.3	6.26.3	*
babel-eslint	8.2.3...8.2.6	8.2.6	*
babel-preset-env	1.6.1...1.7.0	1.7.0	*
cross-env	5.1.4...5.2.0	5.2.0	*
eslint	4.19.1	5.1.0	*
eslint-plugin-ava	4.5.1	5.0.0	*
eslint-plugin-flowtype	2.46.3...2.50.0	2.50.0	*
eslint-plugin-import	2.11.0...2.13.0	2.13.0	*
eslint-plugin-prettier	2.6.0...2.6.2	2.6.2	*
eslint-plugin-promise	3.7.0...3.8.0	3.8.0	*
flow-bin	0.56.0	0.76.0	*
npm-run-all	4.1.2...4.1.3	4.1.3	*
nyc	11.7.1...11.9.0	12.0.2	*
prettier	1.12.1...1.13.7	1.13.7	*

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