Update netlify and snapcraft

netlify.toml

@@ -1,10 +1,10 @@
 [build]
     base    = "docs"
     publish = "docs/public"
-    command = "zola build"
+    command = "curl -sL https://github.com/getzola/zola/releases/download/v0.5.0/zola-v0.5.0-x86_64-unknown-linux-gnu.tar.gz | tar zxv && ./zola build"
 
 [build.environment]
     ZOLA_VERSION = "0.5.0"
 
 [context.deploy-preview]
-    command = "zola build --base-url $DEPLOY_PRIME_URL"
+    command = "curl -sL https://github.com/getzola/zola/releases/download/v0.5.0/zola-v0.5.0-x86_64-unknown-linux-gnu.tar.gz | tar zxv && ./zola build--base-url $DEPLOY_PRIME_URL"

snapcraft.yaml

@@ -1,11 +1,11 @@
 name: zola # you probably want to 'snapcraft register <name>'
-version: '0.5.0+git' # just for humans, typically '1.2+git' or '1.3.2'
+version: '0.5.0' # just for humans, typically '1.2+git' or '1.3.2'
 summary: A fast static site generator in a single binary with everything built-in.
 description: |
   A fast static site generator in a single binary with everything built-in.
   https://www.getzola.org
 
-grade: devel # must be 'stable' to release into candidate/stable channels
+grade: stable # must be 'stable' to release into candidate/stable channels
 confinement: strict # use 'strict' once you have the right plugs and slots
 
 apps:
@@ -22,4 +22,4 @@ parts:
     build-packages:
     - build-essential
     - cmake
-    - git-core
+    - libssl-dev