Add CRAN submission comments for 1.3.0

Author: bjmt

cran-comments.md

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+## Submission
+
+This is a new submission of msaviz, version 1.3.0. The package reshapes
+multiple sequence alignments into tidy data frames and renders them as
+ggplot2 heatmaps or per-sequence lollipop charts.
+
+## R CMD check results
+
+0 errors | 0 warnings | 1 note
+
+The single note is the expected "New submission" message, as this is the
+first release of the package on CRAN.
+
+During local checking one further note may appear, "unable to verify current
+time", which is an artefact of the checking machine being unable to reach a
+time server and does not reflect anything in the package itself. It does not
+arise on a machine with a verifiable clock.
+
+## Test environments
+
+* local macOS (darwin), R 4.4.1
+* win-builder, R-release and R-devel
+* GitHub Actions: ubuntu-latest, windows-latest and macos-latest, across R
+  release, R-devel and R oldrel-1
+
+## Notes for the reviewer
+
+One of the suggested packages, Biostrings, comes from Bioconductor rather than
+CRAN. It is used only optionally, as a convenience for reading alignment files
+and for accepting Biostrings alignment objects as input, and every reference to
+it in the tests, the vignette and the command-line scripts is guarded with
+requireNamespace() or skip_if_not_installed(), so the package builds, checks
+and runs fully without it.
+
+## Downstream dependencies
+
+There are no downstream dependencies, as this is a new package.