Upgrade Ubuntu to 20.04

Author: markhobson

Dockerfile

@@ -1,11 +1,11 @@
-FROM ubuntu:18.04
+FROM ubuntu:20.04
 
 # sqlpackage
 
 ARG SQLPACKAGE_URL=https://download.microsoft.com/download/0/2/0/020aa2fa-f3f2-41ba-bacd-ff15557890d3/sqlpackage-linux-x64-en-US-15.0.5084.2.zip
 
 RUN apt update \
-	&& apt install -y wget zip libunwind8 libicu60 \
+	&& apt install -y wget zip libunwind8 libicu66 \
 	&& wget -O sqlpackage-linux.zip $SQLPACKAGE_URL \
 	&& mkdir /opt/sqlpackage \
 	&& unzip sqlpackage-linux.zip -d /opt/sqlpackage \