Move own tests to suit the new requirements

Also, bump to ubuntu-18.04, dist files already are recommending it,
hence not change needed there, only own tests.

This closes #96.

.github/workflows/test.yml

@@ -25,7 +25,7 @@ jobs:
   citest:
     name: CI test
     needs: selftest
-    runs-on: ubuntu-16.04
+    runs-on: ubuntu-18.04
 
     services:
       postgres:
@@ -54,8 +54,6 @@ jobs:
             moodle-branch: 'MOODLE_38_STABLE'
           - php: '7.2'
             moodle-branch: 'MOODLE_35_STABLE'
-          - php: '7.0'
-            moodle-branch: 'MOODLE_35_STABLE'
 
     steps:
     - name: Check out repository code
@@ -102,6 +100,7 @@ jobs:
         moodle-plugin-ci mustache
         moodle-plugin-ci grunt ||  [ \
             "$MOODLE_BRANCH" != 'master' -a \
+            "$MOODLE_BRANCH" != 'MOODLE_311_STABLE' -a \
             "$MOODLE_BRANCH" != 'MOODLE_310_STABLE' -a \
             "$MOODLE_BRANCH" != 'MOODLE_39_STABLE' ]
         moodle-plugin-ci phpdoc

.travis.yml

@@ -48,6 +48,7 @@ script:
   - moodle-plugin-ci mustache
   - moodle-plugin-ci grunt || [ \
         "$MOODLE_BRANCH" != 'master' -a \
+        "$MOODLE_BRANCH" != 'MOODLE_311_STABLE' -a \
         "$MOODLE_BRANCH" != 'MOODLE_310_STABLE' -a \
         "$MOODLE_BRANCH" != 'MOODLE_39_STABLE' ]
   - moodle-plugin-ci phpdoc
@@ -75,5 +76,3 @@ jobs:
       env: MOODLE_BRANCH=MOODLE_38_STABLE
     - php: 7.2
       env: MOODLE_BRANCH=MOODLE_35_STABLE
-    - php: 7.0
-      env: MOODLE_BRANCH=MOODLE_35_STABLE