operator EQ/NE check

[visualfc]

fix #637
fix #654

cl: add operator EQ/NE type matched check
bytecode: fix and support chan/func/slice/ptr/map/interface operator EQ/NE

Go+ cl check and dump error

var v int
println(v == nil)  // invalid operator: nil == v (mismatched types nil and int)

var a int
var b uint8
println(a == b) // invalid operator: a == b (mismatched types int and uint8)

var a int
switch a {
    case 0:
    case uint8(1): //invalid case uint8(1) in switch on a (mismatched types int and uint8)
}

[codecov-io]

Codecov Report

Merging #656 (681f230) into master (4ac059a) will increase coverage by 0.01%.
The diff coverage is 93.61%.

@@            Coverage Diff             @@
##           master     #656      +/-   ##
==========================================
+ Coverage   90.04%   90.06%   +0.01%     
==========================================
  Files          42       42              
  Lines        9256     9278      +22     
==========================================
+ Hits         8335     8356      +21     
  Misses        651      651              
- Partials      270      271       +1     

Impacted Files	Coverage Δ
exec/bytecode/exec_op_autogen.go	100.00% <ø> (ø)
cl/check_type.go	70.58% <82.35%> (+1.96%)	⬆️
cl/expr.go	89.31% <100.00%> (+0.02%)	⬆️
cl/stmt.go	92.66% <100.00%> (+0.05%)	⬆️
cl/value.go	81.14% <100.00%> (+1.22%)	⬆️
exec/bytecode/operator.go	89.18% <100.00%> (-0.56%)	⬇️

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