Log Message:
(math/R-tibble)  Updated 3.1.8 to 3.2.1

# tibble 3.2.1

## Internal
- Use symbol instead of string in `.Call()`.

# tibble 3.2.0

## Features
- Accurate location of the source of an error in error messages
  (#1379, #1065, #1508).

- `as_data_frame()` now also refers to `as.data.frame()` in its
  deprecation message (#1149, #1506).

## Breaking changes
- Deprecated functions and arguments where we could not detect usage
  by other CRAN packages (#1515):

    - `data_frame_()`, `lst_()`, `frame_data()`

    - `as_tibble(validate = )`, `as_tibble(NULL)`, `new_tibble(subclass = )`

    - `add_row()` and `add_column()` for non-data-frame input

    - `add_column()` for input with non-unique names

    - corner cases for `tbl[[x]]`

- Breaking change: Remove `knit_print.trunc_mat()` method (#1516).

- Forward `trunc_mat()` to new-style pillar methods (#1517).

## Bug fixes

- Allow `glue()` and other classed characters for subassignment (#1150, #1503).

## Performance

- Reduce overhead of single-column subset assignment (#1363).

## Documentation

- New `vignette("extending")` (#275, #1512).

- Minor updates (#1151, #1070, #1512, #1485).

- Update example for `nrow` argument to `new_tibble()` (@heavywatal, #1394).

- Fix display of mermaid diagrams in `vignette("formats")` (@maelle, \ 
#1497, #1498).

- Remove ANSI escapes from invariants article on pkgdown (#1374).

## Internal

- Require vctrs >= 0.4.1 and pillar >= 1.8.1

- Use cli for formatting conditions (#1387).

- Use `vec_as_location(missing = "error")` for better error messages
  (#741, #1511).

- Remove compatibility code for RSDA package which is broken anyway
  due to other changes (#923, #1509).

- Skip tests if suggested packages not available (#1246, @MichaelChirico).

- Remove obsolete tests (#1513).