markummitchell/engauge-digitizer: New point types

Additional releases are available elsewhere:

• For all linux distributions using the <a href="https://flathub.org/apps/details/io.github.markummitchell.Engauge_Digitizer">Engauge release for Flathub</a> as part of the <a href="https://flathub.org">Flathub Project</a>
• For all linux distributions using the <a href="https://snapcraft.io/engauge-digitizer">Engauge Digitizer for Snapcraft</a> from the <a href="https://snapcraft.io/store">Snapcraft Store</a>
• For many linux distributions as part of the distribution
• For OSX from the Mac App Store on your Mac computer
• From the <a href="https://cygwin.com/install.html">cygwin installer</a> in Windows

Release changes:

• New hourglass and triangle point types (#346)
• Fix data export for log scale data when step factor is less than one (#345)