Add Base.round(x::IrrationalConstant, r::RoundingMode)

[hyrodium]

This PR fixes #23.

Before this PR

julia> using IrrationalConstants 
[ Info: Precompiling IrrationalConstants [92d709cd-6900-40b7-9082-c6be49f344b6]

julia> round(twoπ)
ERROR: MethodError: no method matching round(::IrrationalConstants.Twoπ, ::RoundingMode{:Nearest})
Closest candidates are:
  round(::Real, ::RoundingMode; digits, sigdigits, base) at floatfuncs.jl:128
  round(::Union{Float16, Float32, Float64}, ::RoundingMode{:Nearest}) at float.jl:370
  round(::Integer, ::RoundingMode) at floatfuncs.jl:157
  ...

After this PR

julia> using IrrationalConstants

julia> round(twoπ)
6.0

I have not added tests yet because not to make conflicts with #22.

[coveralls]

Pull Request Test Coverage Report for Build 4253675818

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
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• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 1 of 1 (100.0%) changed or added relevant line in 1 file are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage decreased (-2.6%) to 97.368%

---

Files with Coverage Reduction	New Missed Lines	%
src/macro.jl	1	96.97%

Totals
Change from base Build 4223760967:	-2.6%
Covered Lines:	37
Relevant Lines:	38

---

💛 - Coveralls

[codecov]

Codecov Report

Base: 97.36% // Head: 97.43% // Increases project coverage by +0.06% 🎉

Coverage data is based on head (c8867ff) compared to base (1275225).
Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #24      +/-   ##
==========================================
+ Coverage   97.36%   97.43%   +0.06%     
==========================================
  Files           2        2              
  Lines          38       39       +1     
==========================================
+ Hits           37       38       +1     
  Misses          1        1              

Impacted Files	Coverage Δ
src/macro.jl	97.36% <100.00%> (+0.07%)	⬆️

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[devmotion]

I think it's important to fix this regression, so I merged the main branch and added some tests. Thanks @hyrodium, feel free to make a follow-up PR if you are unhappy with any of these final changes!