update electron to v43

electron/node_modules/semver/range.bnf

@@ -10,7 +10,8 @@ nr         ::= '0' | [1-9] ( [0-9] ) *
 tilde      ::= '~' partial
 caret      ::= '^' partial
 qualifier  ::= ( '-' pre )? ( '+' build )?
-pre        ::= parts
-build      ::= parts
-parts      ::= part ( '.' part ) *
-part       ::= nr | [-0-9A-Za-z]+
+pre        ::= prepart ( '.' prepart ) *
+prepart    ::= nr | alphanumid
+build      ::= buildid ( '.' buildid ) *
+alphanumid ::= ( [0-9] ) * [A-Za-z-] [-0-9A-Za-z] *
+buildid    ::= [-0-9A-Za-z]+