Allow build with py-prompt_toolkit 2.x

• Bump PORTREVISION for package change

Obtained from: https://github.com/jonathanslenders/http-prompt/commit/34de86178d8ae2b478e0ad989222aab24dd4c046

		https://github.com/jonathanslenders/http-prompt/commit/d3d84de2aa7f3fce521e5ac63f4bbcf9a2166501

Approved by: dbaio (maintainer)