Even if another generous supporter shows up and give him the rest of the money for the 0.2 update, the 0.3 one will need even more money (dev wants $1600), because i highly doubt that they (or he) will give him all this money again for 0.3, and the dev's income will drop to a level compatible with 45 patrons, the gap will be huge and theres no way he will get the money ($1600) for 0.3v, and even if the number of patrons increases with the V.02 release, this will not be enough to fill the gap in my opinion.
Every single update this dev will need a crazy person with no love with his own money to support him, what are the odds?