v0.8.11

Fixed bugs

• Fixed no reaction toward an index designation on referring a special parameter

### before ###
🍣 echo ${@[1]}

🍣 echo $?
0
### after ###
🍣 echo ${@[1]}
sush: ${@[1]}: bad substitution
🍣 echo $?
1

• Fixed wrong word splitting on $@ and ${array[@]} in a double quoted subword

### before ###
🍣 set a b c ; for x in "@$@x" ; do echo $x ; done
@a 
b
### after ###
🍣 set a b c ; for x in "@$@x" ; do echo $x ; done
@a 
b
cx