Test all engines in develop.

.travis.yml

@@ -35,7 +35,7 @@ jobs:
         - ./dev/prove -lr t
 
     - stage: 📈 Coverage
-      if: branch = master
+      if: branch = develop
       services: docker
       env: COVERAGE=1
       before_install:
@@ -61,7 +61,7 @@ jobs:
 
     - &postgres
       stage: 🐘 Postgres
-      if: branch = master
+      if: branch = develop
       env: POSTGRES=11
       before_install:
         - source dev/linux-postgres
@@ -90,7 +90,7 @@ jobs:
     # https://sqlite.org/chronology.html
     - &sqlite
       stage: 💡 SQLite
-      if: branch = master
+      if: branch = develop
       env: SQLITE=3.26.0
       before_install:
         - source dev/linux-sqlite
@@ -140,7 +140,7 @@ jobs:
     # https://hub.docker.com/_/mariadb
     - &mysql
       stage: 🐬 MySQL
-      if: branch = master
+      if: branch = develop
       services: docker
       env: MYSQL=mysql:8.0
       before_install:
@@ -170,7 +170,7 @@ jobs:
     # https://hub.docker.com/r/cjonesy/docker-vertica/tags
     - &vertica
       stage: 🔺 Vertica
-      if: branch = master
+      if: branch = develop
       env: VERTICA=9.1.1-0
       before_install:
         - source dev/linux-vertica
@@ -189,7 +189,7 @@ jobs:
     # https://hub.docker.com/r/exasol/docker-db/tags
     - &exasol
       stage: ☀️ Exasol
-      if: branch = master
+      if: branch = develop
       env: EXASOL=6.1.1-d1
       before_install:
         - source dev/linux-exasol
@@ -202,7 +202,7 @@ jobs:
     # https://hub.docker.com/r/jacobalberty/firebird/tags
     - &firebird
       stage: 🔥 Firebird
-      if: branch = master
+      if: branch = develop
       env: FIREBIRD=3.0
       before_install:
         - source dev/linux-firebird