Added test cases for let and numeric-if
Added test cases for let and numeric-if

gcbeyond/nu,spotify/nu,jqk6/nu,jqk6/nu,hodgeswt/nu,gcbeyond/nu,heiko-henrich/nutor,alloy/nu,timburks/nu,hodgeswt/nu,timburks/nu,alloy/nu,gcbeyond/nu,heiko-henrich/nutor,jqk6/nu,hodgeswt/nu,heiko-henrich/nutor,spotify/nu,nulang/nu,jqk6/nu,spotify/nu,nulang/nu,heiko-henrich/nutor,timburks/nu,spotify/nu,nulang/nu,hodgeswt/nu,gcbeyond/nu