Add fallback to commit ID when version tag is missing (#7)

Author: syeopite

src/protodec.cr

@@ -19,7 +19,7 @@ require "./protodec/utils"
 
 CURRENT_BRANCH  = {{ "#{`git branch | sed -n '/* /s///p'`.strip}" }}
 CURRENT_COMMIT  = {{ "#{`git rev-list HEAD --max-count=1 --abbrev-commit`.strip}" }}
-CURRENT_VERSION = {{ "#{`git describe --tags --abbrev=0`.strip}" }}
+CURRENT_VERSION = {{ "#{`git describe --always --tags --abbrev=0`.strip}" }}
 
 SOFTWARE = {
   "name"    => "protodec",