v1.0

A very small changelog: I now consider v1.0 to be in a very useable state!
If I feel like it, I might continue working on potential features like the fabled unknown for v1.1, or maybe even upvar or uplevel.

• read -d now supports more than one delim
• expr now has a comma/chaining operator
• Directory stack QoL improvements
• Alias substitution bugfixes
• Add max possible long double precision
• Maybe, other bugfixes too.
• Fixed string range behaviour