update dependencies at 20190220020119

[taichi]

Updating Dependencies

Name	Updating	Latest	devDependencies
ava	0.22.0	1.2.1	*
babel-eslint	8.2.6	10.0.1	*
eslint	4.19.1	5.14.1	*
eslint-config-prettier	2.10.0	4.0.0	*
eslint-plugin-ava	4.5.1	5.1.1	*
eslint-plugin-flowtype	2.50.3	3.4.2	*
eslint-plugin-import	2.14.0...2.16.0	2.16.0	*
eslint-plugin-prettier	2.7.0	3.0.1	*
eslint-plugin-promise	3.8.0	4.0.1	*
flow-bin	0.56.0	0.93.0	*
nyc	11.9.0	13.3.0	*
prettier	1.15.3...1.16.4	1.16.4	*
rimraf	2.6.2...2.6.3	2.6.3	*

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