Replace queue macro with inline functions

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 89.01515% with 29 lines in your changes are missing coverage. Please review.

Project coverage is 81.16%. Comparing base (61fc84c) to head (d887635). Report is 8 commits behind head on master.

:exclamation: Current head d887635 differs from pull request most recent head 27e7835. Consider uploading reports for the commit 27e7835 to get more accurate results

Files	Patch %	Lines
src/raft/uv_writer.c	38.46%	4 Missing and 4 partials :warning:
src/roles.c	41.66%	4 Missing and 3 partials :warning:
src/raft/uv_append.c	91.30%	2 Missing and 2 partials :warning:
src/lib/queue.h	82.35%	0 Missing and 3 partials :warning:
src/raft/uv.c	87.50%	0 Missing and 2 partials :warning:
src/raft/uv_prepare.c	90.47%	1 Missing and 1 partial :warning:
src/raft/client.c	50.00%	1 Missing :warning:
src/raft/uv_snapshot.c	66.66%	1 Missing :warning:
src/raft/uv_work.c	66.66%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #604 +/- ## ========================================== - Coverage 81.21% 81.16% -0.06% ========================================== Files 191 190 -1 Lines 27033 26758 -275 Branches 4944 4913 -31 ========================================== - Hits 21956 21718 -238 + Misses 3483 3451 -32 + Partials 1594 1589 -5 ```

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[cole-miller]

@just-now could you rebase this? (Sorry for the delay)