[MINOR][INFRA][R] Show the installed packages in R in a prettier way

[HyukjinKwon]

What changes were proposed in this pull request?

This PR proposes to fix the AppVeyor configuration to show all installed R packages with name/versions.

Before:

[1] '1.29'
[1] '2.3'
[1] '2.3.2'
[1] '1.7.3'
[1] '3.2.3'
[1] '0.17.1'

After:

                  Package  Version
arrow               arrow   0.17.1
askpass           askpass      1.1
assertthat     assertthat    0.2.1
backports       backports    1.1.8
base64enc       base64enc    0.1-3
bit                   bit 1.1-15.2
bit64               bit64    0.9-7
...

Why are the changes needed?

To show the package versions in a prettier way, and don't update the line every time when a package is added.

Does this PR introduce any user-facing change?

No, dev-only.

How was this patch tested?

AppVeyor CI should test it out.

[SparkQA]

Test build #125349 has started for PR 29038 at commit c3985ad.

[HyukjinKwon]

The tests failure in AppVeyor is orthogonal. It still prints fine the package information:

[00:01:52]                   Package  Version
[00:01:52] arrow               arrow   0.17.1
[00:01:52] assertthat     assertthat    0.2.1
[00:01:52] backports       backports    1.1.8
[00:01:52] base64enc       base64enc    0.1-3
[00:01:52] bit                   bit 1.1-15.2
[00:01:52] bit64               bit64    0.9-7
[00:01:52] callr               callr    3.4.3
[00:01:52] cli                   cli    2.0.2
[00:01:52] crayon             crayon    1.3.4
[00:01:52] desc                 desc    1.2.0
[00:01:52] digest             digest   0.6.25
[00:01:52] e1071               e1071    1.7-3
[00:01:52] ellipsis         ellipsis    0.3.1
[00:01:52] evaluate         evaluate     0.14
[00:01:52] fansi               fansi    0.4.1
[00:01:52] glue                 glue    1.4.1
[00:01:52] highr               highr      0.8
[00:01:52] htmltools       htmltools    0.5.0
[00:01:52] jsonlite         jsonlite    1.7.0
[00:01:52] knitr               knitr     1.29
[00:01:52] magrittr         magrittr      1.5
[00:01:52] markdown         markdown      1.1
[00:01:52] mime                 mime      0.9
[00:01:52] pkgbuild         pkgbuild    1.0.8
[00:01:52] pkgload           pkgload    1.1.0
[00:01:52] praise             praise    1.0.0
[00:01:52] prettyunits   prettyunits    1.1.1
[00:01:52] processx         processx    3.4.3
[00:01:52] ps                     ps    1.3.3
[00:01:52] purrr               purrr    0.3.4
[00:01:52] R6                     R6    2.4.1
[00:01:52] Rcpp                 Rcpp    1.0.5
[00:01:52] rlang               rlang    0.4.6
[00:01:52] rmarkdown       rmarkdown      2.3
[00:01:52] rprojroot       rprojroot    1.3-2
[00:01:52] rstudioapi     rstudioapi     0.11
[00:01:52] stringi           stringi    1.4.6
[00:01:52] stringr           stringr    1.4.0
[00:01:52] testthat         testthat    2.3.2
[00:01:52] tidyselect     tidyselect    1.1.0
[00:01:52] tinytex           tinytex     0.24
[00:01:52] vctrs               vctrs    0.3.1
[00:01:52] withr               withr    2.2.0
[00:01:52] xfun                 xfun     0.15
[00:01:52] yaml                 yaml    2.2.1
[00:01:52] translations translations    4.0.2

[dongjoon-hyun]

+1, LGTM. I verified the result in AppVeyor. Thanks, @HyukjinKwon .
Merged to master.

[HyukjinKwon]

Thanks @dongjoon-hyun.

[SparkQA]

Test build #125364 has finished for PR 29038 at commit 91bbf8a.

• This patch fails Spark unit tests.
• This patch merges cleanly.
• This patch adds no public classes.