Log message:
(math/R-units) Updated 0.8.1 to 0.8.2

# version 0.8-2

* Names are preserved when doing unit conversions; #305 @billdenney

* Identical units will always divide (`/`) and allow integer division (`%/%`).
  And, inverse units will always be able to multiply; #310 @billdenney

* Compare units via `ud_compare()`, fixing inconsistent results for aliases
  and symbols; #339, #346, #347

* Fix `units<-()` to treat an empty unit the same as `NULL`; #332

* New `as.data.frame()` method for `mixed_units`; #309

* Use short paths for database loading on Windows to fix UTF-16 issues; #342

* Add example in the docs about reversing a ggplot2 units scale; #343

* Force storage mode to double; #344 addressing #324

* Fix units in transformed axis; #323

* Consider unitless as radians in trigonometric functions; #328

Log message:
(math/R-units) Updated 0.7.2 to 0.8.1

# version 0.8-1

* fix `%/%` and `%%` if arguments have different units; #313

* fix multiplier parsing for `exp(log(x))` operations; #321

* fix specification of secondary axes with `scale_units`; #326

# version 0.8-0

* enhance unit mapping for newly installed units; #290

* remove deprecations: `install_symbolic_unit`, `remove_symbolic_unit`,
  `install_conversion_constant`, `install_conversion_offset`; #290

* fix multipliers for round trip log-exp operations; #292

* integrate `ggplot2` scales (previously in the `ggforce` package) to
  automatically print axes with units; #294 addressing #164

* fix `all.equal.units` for non-units `current`

* fix zero power; #285

* fix `unique.units` to support arrays and matrices, implement methods for
  `duplicated` and `anyDuplicated`

* fix plot labels with spaces; #298 addressing #297

* always add units to labels, including user-provided ones; as part of #298

* new symbols/names with a percentage character are not allowed due to an
  upstream bug; #289

Log message:
math: Replace RMD160 checksums with BLAKE2s checksums

All checksums have been double-checked against existing RMD160 and
SHA512 hashes

Log message:
math: Remove SHA1 hashes for distfiles

Log message:
(math/units)  Updated 0.7.1 to 0.7.2

# version 0.7-2

* enhance `pillar` integration; #273, #275, #280 @krlmlr

* new `unique` method for `units` and `mixed_units` objects; #283 addressing
  #277 @lewinfox

Log message:
(math/R-units) Updated 0.6.5 to 0.7.1

# version 0.7-1

* allow longer units grouping; #270 addressing #269 @bart1

* fix regression in `set_units` method for `mixed_units` to ensure that
  ordering is preserved; #272 addressing #271

# version 0.7-0

* add `load_units_xml` to enable database reloading as well as loading
  user-provided unit systems; #254 addressing #243, #244

* add `install_unit` and `remove_unit` for adding/removing custom user-defined
  symbols or names, with optional mapping to existing units;
  `install_symbolic_unit`, `remove_symbolic_unit`, `install_conversion_constant`,
  `install_conversion_offset` are deprecated; #261 addressing #89

* add `keep_units`, a helper to apply functions that do not preserve units;
  #255 addressing #252

* fix `as_units("")`, which is now equivalent to `unitless`; #199

* fix plot axes for `plot.formula` and `plot.data.frame`; #213

* fix arithmetic for powers above 1 and below -1; #264

* improve arithmetic of logarithms; #249

* export `ud_are_convertible`; #263 addressing #258 @cregouby

* remove deprecations: `as.units`, `as_cf`, `make_unit`, `parse_unit`; #259

* remove deprecated pre-computed `ud_units` database; #259

# version 0.6-7

* port `isFALSE` to fix regression in old R versions; #230 addressing #229

* fix replacement operation for `units` objects; #233 addressing #232

* fix compatibility with dplyr 1.0; #247 addressing #239

# version 0.6-6

* prettier `str` print for units and mixed units; #228 addressing #227

* add compatibility with upcoming tibble v3.0.0; #225

Log message:
math/R-units: import R-units-0.6.5

Support for measurement units in R vectors, matrices and arrays:
automatic propagation, conversion, derivation and simplification of
units; raising errors in case of unit incompatibility. Compatible with
the POSIXct, Date and difftime classes. Uses the UNIDATA udunits
library and unit database for unit compatibility checking and
conversion.