PyneComp v6.1.1 — maps returned from methods iterate correctly, and request.security…

Fixes

• A for [k, v] in loop over a map returned by a user method (h.getMap()) or read from a field (hs.get(0).m) put the key into v too; v now gets the value. (#112)
• In Pine v6, c ? <bool> : na and c ? na : <bool> are now refused with an error, as TradingView refuses them. bool(na) still works, and v5 scripts are unaffected. (#117)
• [a, b] = request.security(s, tf, f()), where f() returns three values, now compiles and reads the first two values.