Update pgcgap to v1.0.18

[liaochenlanruo]

Describe your pull request here

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[dpryan79]

I'll try to figure out why conda isn't able to solve this in a reasonable amount of time.

[dpryan79]

@bioconda-bot please update

[dpryan79]

@bioconda-bot please fetch artifacts

[BiocondaBot]

Package(s) built on CircleCI are ready for inspection:

Arch	Package	Repodata
noarch	pgcgap-1.0.18-py37pl526_0.tar.bz2	repodata.json

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You may also use conda to install these:

• For packages on noarch:

conda install -c https://113264-42372094-gh.circle-artifacts.com/0/tmp/artifacts/packages <package name>

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Docker image(s) built:

Package	Tag	Install with docker
pgcgap	1.0.18--py37pl526_0	show curl "https://113264-42372094-gh.circle-artifacts.com/0/tmp/artifacts/images/pgcgap%3A1.0.18--py37pl526_0.tar.gz" | gzip -dc | docker load

[dpryan79]

The hash may suggest that this is python 3.7 only, but the metadata inside suggests that it's properly generic.

[dpryan79]

@bioconda-bot please merge

[BiocondaBot]

I will attempt to upload artifacts and merge this PR. This may take some time, please have patience.