Update repositories.txt (#3702)

Author: nthnn

repositories.txt

@@ -140,6 +140,7 @@ https://github.com/felias-fogg/avrCalibrate
 https://github.com/crunchysteve/EdgieD
 https://github.com/nthnn/PortaMob
 https://github.com/nthnn/SIM900
+https://github.com/nthnn/microlzw
 https://github.com/nthnn/Diwa
 https://github.com/nthnn/TCS3200
 https://github.com/nthnn/Anomalia