update chaosblade module to v1.4.0

Signed-off-by: xcaspar <changjun.xcj@alibaba-inc.com>

chore:update version to 0.8.0

Signed-off-by: tiny.x <185120555@qq.com>

chore:update version to 0.7.0

Signed-off-by: xcaspar <x.caspar@gmail.com>

Merge pull request #3 from leonardo669/master

docs: Documentation only changes