all: use go tool directive

Signed-off-by: Sebastien Binet <binet@cern.ch>

all: use built-in min and max functions

We can use the built-in `min` and `max` functions since Go 1.21.

Signed-off-by: Eng Zer Jun <engzerjun@gmail.com>

all: bump go-fonts/liberation@v0.4.1, go-latex/latex@v0.0.1

Signed-off-by: Sebastien Binet <binet@cern.ch>

all: migrate to codeberg

Signed-off-by: Sebastien Binet <binet@cern.ch>

all: bump gg@v0.6.0

gg@v0.6.0 has a better handling of points' closeness.
see:
https://git.sr.ht/~sbinet/gg/commit/1994be2d12593293d38a10764df23880fee6f436

Fixes #687.

Signed-off-by: Sebastien Binet <binet@cern.ch>

all: bump to Go-1.21, drop Go-1.19

Signed-off-by: Sebastien Binet <binet@cern.ch>

all: update dependencies for Gonum-v0.13.0

Signed-off-by: Sebastien Binet <binet@cern.ch>

all: bump gonum@v0.12.0, x/image and x/exp

Signed-off-by: Sebastien Binet <binet@cern.ch>

ci: use go install pkg@latest

Signed-off-by: Sebastien Binet <binet@cern.ch>

all: bump ajstarks/svgo@v0.0.0-20211024235047-1546f124cd8b

This ajstarks/svgo revision provides support for Go modules.