Update to deno 1.2.0 (std to 0.61.0)

[LarsVomMars]

Version of std prior to 0.61.0 are incompatible with Deno 1.2.0. which breaks all applications running on deno 1.2+.
To fix it you should update all std dependencies to 0.61.0+.

[LarsVomMars]

But keep in mind that this will break all applications running on <1.2.0 and the update may cause some more errors and failures at first. So simply updating std probably won't work :c