Bug fixes

[richardreeve]

Minor fixes:

• unrooted trees weren't always creating branches as expected
• ensure types returned are the same as received
• node order requests are not obeyed for getnodes() - was for traversal()
• remove JuliaDB dependency
• fix R workflow
• fix Migrate from LightGraphs to Graphs #77

[github-actions]

Pull Request Test Coverage Report for Build 4778535667

• 18 of 24 (75.0%) changed or added relevant lines in 4 files are covered.
• 149 unchanged lines in 15 files lost coverage.
• Overall coverage increased (+1.3%) to 58.093%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/rand.jl	0	3	0.0%
src/rcall.jl	0	3	0.0%

Files with Coverage Reduction	New Missed Lines	%
src/Branch.jl	1	70.0%
src/trim.jl	1	97.22%
src/Iterators.jl	2	95.05%
src/metrics.jl	3	48.65%
src/TreeSet.jl	4	40.63%
src/routes.jl	5	63.64%
src/Tree.jl	5	81.71%
src/rand.jl	6	61.34%
src/API.jl	8	59.15%
src/Node.jl	8	39.29%

Totals
Change from base Build 1356629049:	1.3%
Covered Lines:	1267
Relevant Lines:	2181

---

💛 - Coveralls

[richardreeve]

Hi @mkborregaard - no problem if you're busy, I don't think there's anything controversial here - but I just thought I'd ask if you had time to check these fixes that we need before we merge in the inference work.