Update package version to 2.2.8

pkg.info

@@ -1,7 +1,7 @@
 name: nim
 description: Statically typed compiled systems programming language
-version: 2.2.6
-revision: 2
+version: 2.2.8
+revision: 1
 url: https://nim-lang.org/
 license: MIT
 maintainers:
@@ -13,8 +13,13 @@ depends:
   - gcc
   - gcc-libs
   - glibc
+make_depends:
+  - git
+  - help2man
+  - nodejs
 downloads:
-  - url: https://nim-lang.org/download/nim-${BPM_PKG_VERSION}.tar.xz
-    extract_to: ${BPM_SOURCE}
-    extract_strip_components: 1
-    checksum: 657b0e3d5def788148d2a87fa6123fa755b2d92cad31ef60fd261e451785528b
+  - url: https://github.com/nim-lang/Nim
+    type: git
+    clone_to: ${BPM_SOURCE}
+    git_branch: v${BPM_PKG_VERSION}
+    checksum: 4f500679b196fad944caa50a753f5bbfaefda001