~samwhited/checkmd

checkmd: bump deps

Signed-off-by: Sam Whited <sam@samwhited.com>
checkmd: don't short circuit if file has errors

Signed-off-by: Sam Whited <sam@samwhited.com>
all: run go mod tidy

Signed-off-by: Sam Whited <sam@samwhited.com>
Initial commit with simple link parsing

Added an initial tool that verifies that links are valid URLs and is not
configurable.

See https://mellium.im/issue/41

Signed-off-by: Sam Whited <sam@samwhited.com>