multi error checking, version bump, fix shards install for crystal 1

Author: fridgerator

shard.yml

@@ -1,11 +1,13 @@
 name: crecto
-version: 0.12.0
+version: 0.12.1
 
 authors:
   - Nick Franken <shnick@gmail.com>
 
 license: MIT
 
+crystal: ">= 1.0.0, < 2.0.0"
+
 dependencies:
   db:
     github: crystal-lang/crystal-db

src/crecto/repo.cr

@@ -542,7 +542,8 @@ module Crecto
 
     {% for operation in %w[insert update delete] %}
       private def run_operation(operation : Multi::{{operation.camelcase.id}}, tx)
-        {{operation.id}}(operation.instance, tx)
+        cs = {{operation.id}}(operation.instance, tx)
+        raise cs.errors.first[:message] if !cs.valid?
       rescue ex : Exception
         raise OperationError.new(ex, operation.instance.class, {{operation}})
       end

src/crecto/version.cr

@@ -1,3 +1,3 @@
 module Crecto
-  VERSION = "0.12.0"
+  VERSION = "0.12.1"
 end