Larry Taylor updates StandaloneHost to v2.1.3 for OS X

Larry Taylor has updated StandaloneHost for macOS to version 2.1.3.

Changes:

• Added the ability to select any installed synth if the app has not been renamed.
• Added tempo setting.
• Added SMF playback.
• Fixed some synths with no audio output (e.g., Martinic AX73) or UI (e.g., Audio Damage Axon 2), and other issues.
• Changed minimum macOS version to 10.13 (High Sierra).