i12e (CI): improve TravisCI build

Reduce the number of jobs

Author: vladfaust

.travis.yml

@@ -6,28 +6,25 @@ cache:
     - lib
 jobs:
   include:
-    - stage: Install shards
-      script: shards install
-    - stage: Run tests
-    - name: Run Crystal specs
+    - stage: Tests
+      name: Crystal spec
       script:
         - crystal spec
-    - name: Run PostgreSQL specs
+    - name: PostgreSQL spec
       env:
         - POSTGRESQL_URL=postgres://postgres@localhost:5432/test
       before_script:
         - psql -c 'create database test;' -U postgres
         - psql $POSTGRESQL_URL < db_spec/pg/migration.sql
       script:
-        - shards install
         - env POSTGRESQL_URL=$POSTGRESQL_URL crystal spec db_spec/pg
-    - name: Run SQLite3 specs
+    - name: SQLite3 spec
       env: $SQLITE3_URL=sqlite3://./test.sqlite3
       before_script:
         - sqlite3 ./test.sqlite3 < db_spec/sqlite3/migration.sql
       script:
         - env SQLITE3_URL=$SQLITE3_URL crystal spec db_spec/sqlite3
-    - stage: Deploy
+    - stage: Deployment
       script:
         - crystal docs
       deploy: