ENH: Pass arguments to FuncCond

[Miksus]

This enables the following pattern:

@app.cond()
def file_exists(file):
    return Path(file).is_file()

@app.task(file_exists("myfile.csv"))
def do_things():
    ...

One can now pass arguments (positional/keyword).

[codecov-commenter]

Codecov Report

Merging #94 (9a50bd6) into master (e65ce24) will increase coverage by 0.02%. The diff coverage is 88.88%.

@@            Coverage Diff             @@
##           master      #94      +/-   ##
==========================================
+ Coverage   91.64%   91.67%   +0.02%     
==========================================
  Files          89       89              
  Lines        4523     4526       +3     
==========================================
+ Hits         4145     4149       +4     
+ Misses        378      377       -1     

Impacted Files	Coverage Δ
rocketry/conditions/func.py	89.58% <88.88%> (+2.91%)	:arrow_up:

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