Error wrapping

[libmonsoon-dev]

With these changes, the following code

import (
	"strconv"
)

const str = "test"

func foo(arg string) (int, error) {
	return strconv.Atoi(arg)?, nil
}

func bar(arg string) (int, error) {
	fn := foo

	return fn(arg)?, nil
}

func baz(arg string) (int, error) {
	return bar(arg)?, nil
}

println baz(str)

will print the following

0 strconv.Atoi: parsing "test": invalid syntax

===> errors stack:
main.foo()
        cmd/test/main.gop:8 strconv.Atoi(arg)
main.bar()
        cmd/test/main.gop:14 fn(arg)
main.baz()
        cmd/test/main.gop:18 bar(arg)

[xushiwei]

Don't add VERSION file into the main branch (it can only exist in release branches).

[codecov-commenter]

Codecov Report

Merging #1347 (c655a50) into main (0c434fe) will increase coverage by 0.00%.
The diff coverage is 93.10%.

@@           Coverage Diff           @@
##             main    #1347   +/-   ##
=======================================
  Coverage   90.99%   90.99%           
=======================================
  Files          22       22           
  Lines        8524     8551   +27     
=======================================
+ Hits         7756     7781   +25     
- Misses        618      619    +1     
- Partials      150      151    +1     

Impacted Files	Coverage Δ
cl/expr.go	95.67% <93.10%> (-0.12%)	⬇️

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