Update cactoos to 0.39

[yegor256]

Update cactoos to 0.39

[0crat]

@llorllale/z please, pay attention to this issue

[victornoel]

@llorllale I can do it if you want, I haven't been assigned DEV jobs for some time :)

[llorllale]

@0crat assign @victornoel

[0crat]

@0crat assign @victornoel (here)

@llorllale The job #72 assigned to @victornoel/z, here is why; the budget is 30 minutes, see §4; please, read §8 and §9; if the task is not clear, read this and this; there will be no monetary reward for this job

[0crat]

Manual assignment of issues is discouraged, see §19: -5 point(s) just awarded to @llorllale/z

[0crat]

Bug was reported, see §29: +15 point(s) just awarded to @ilyakharlamov/z

[victornoel]

@0crat wait for #73

[0crat]

@0crat wait for #73 (here)

@victornoel The impediment for #72 was registered successfully by @victornoel/z

[victornoel]

@ilyakharlamov you can now close this issue, the PR (#73) has been merged :)

[0crat]

The job #72 is now out of scope

[0crat]

Order was finished: +30 point(s) just awarded to @victornoel/z