Fix regex and version in cygwin manifest. Update cygwin manifest to install lynx and wget. Keep the cygwin installer after installation.

cygwin.json

@@ -1,5 +1,5 @@
 {
-    "version": ".",
+    "version": "2.8.2",
     "homepage": "https://cygwin.com/",
     "architecture": {
         "64bit": {
@@ -29,18 +29,19 @@
         ]
     ],
     "checkver": {
-        "re": "The most recent version of the Cygwin DLL is[^>]*([\\d\\.]+)"
+        "re": "The most recent version of the Cygwin DLL is[^>]*>([\\d\\.]+)<"
     },
     "installer": {
         "args": [
             "--no-admin",
             "--no-desktop",
             "--local-package-dir $dir\\packages",
-            "--packages default",
+            "--packages default,lynx,wget",
             "--quiet-mode",
             "--root $dir\\root",
             "--site http://mirrors.kernel.org/sourceware/cygwin/"
-        ]
+        ],
+        "keep": "true"
     },
     "notes": "To start a Cygwin shell, type \"cygwin\"",
     "persist": [