Remove script to generate shrinkwrap

Makefile

@@ -9,12 +9,6 @@ all:
 clean:
 	rm -rf node_modules/
 
-shrinkwrap: clean
-	rm npm-shrinkwrap.json
-	npm install --no-shrinkwrap --production
-	npm prune
-	npm shrinkwrap
-
 distclean: clean
 	rm config.status*
 

scripts/install.sh

@@ -4,4 +4,4 @@ if [[ "$OSTYPE" == "darwin"* ]]; then
     export PKG_CONFIG_PATH=/usr/local/lib/pkgconfig:/opt/X11/lib/pkgconfig
 fi
 
-npm install
+yarn