Fix merge conflicts from nf-core template v1.12 update

[heuermh]

An attempt to fix merge conficts in #6 ; seems there is an issue with the Docker image version of smoothxg being out-of-sync with both the command used here and also with that in https://github.com/pangenome/pggb/blob/master/pggb.

See pangenome/pggb#30

[heuermh]

Also, it is hard to tell if CI is actually running the workflow

...
N E X T F L O W  ~  version 20.10.0
Launching `/home/runner/work/pangenome/pangenome/main.nf` [stoic_monod] - revision: a886153fcf
WARN: DSL 2 IS AN EXPERIMENTAL FEATURE UNDER DEVELOPMENT -- SYNTAX MAY CHANGE IN FUTURE RELEASE
----------------------------------------------------
                                        ,--./,-.
        ___     __   __   __   ___     /,-._.--~'
  |\ | |__  __ /  ` /  \ |__) |__         }  {
  | \| |       \__, \__/ |  \ |___     \`-._,-`-,
                                        `._,._,'
  nf-core/pangenome v1.0dev
----------------------------------------------------

[ec/17b293] Submitted process > edyeet (1)
[b9/9df2ed] Submitted process > seqwish (1)
[e3/3c3529] Submitted process > smoothxg (1)
[f0/9a514d] Submitted process > odgiBuild (1)
[ba/083e49] Submitted process > odgiChop (1)
[46/24b8c6] Submitted process > odgiViz (1)
[e1/08f70e] Submitted process > odgiLayout (1)
[97/5b2e3b] Submitted process > odgiDraw (1)
WARN: To render the execution DAG in the required format it is required to install Graphviz -- See http://www.graphviz.org for more info.

https://github.com/nf-core/pangenome/pull/7/checks?check_run_id=1439564849

From running this locally, I expect it to fail.

[heuermh]

Ready for review.

This is working for me now locally with a new pull of the ghcr.io/pangenome/pggb:latest tag. The failing check in nf-core lint can safely be ignored, see nf-core/tools#791 and discussion on Slack.

[Zethson]

LGTM, thanks!