Linux .deb file: update symlink on package update

* overwrite symlink on update

* fix size and list definition

bin/package.js

@@ -303,9 +303,10 @@ function buildLinux (packageType, cb) {
         info: {
           arch: 'amd64',
           targetDir: distPath,
+          depends: 'libc6 (>= 2.4)',
           scripts: {
             postinst: path.join(config.STATIC_PATH, 'linux', 'postinst'),
-            postrm: path.join(config.STATIC_PATH, 'linux', 'postrm')
+            prerm: path.join(config.STATIC_PATH, 'linux', 'prerm')
           }
         }
       }, [{

package.json

@@ -44,7 +44,7 @@
     "electron-packager": "^6.0.0",
     "electron-winstaller": "feross/windows-installer#build",
     "gh-release": "^2.0.3",
-    "nobin-debian-installer": "^0.0.6",
+    "nobin-debian-installer": "^0.0.8",
     "plist": "^1.2.0",
     "standard": "^6.0.5"
   },

static/linux/postinst

@@ -1,4 +1,4 @@
 #!/bin/sh
 set -e
 chmod +x /opt/webtorrent-desktop/WebTorrent
-ln -s /opt/webtorrent-desktop/WebTorrent /usr/bin/webtorrent-desktop
+ln -s -f /opt/webtorrent-desktop/WebTorrent /usr/bin/webtorrent-desktop