update .travis.yml

.travis.yml

@@ -2,10 +2,9 @@ language: php
 os:
   - linux
 php:
+  - 7.4
   - 7.3
   - 7.2
-  - 7.1
-  - 7.0
   - 5.6
 
 env:
@@ -17,11 +16,13 @@ matrix:
   include:
     - php: 5.6
       env: TEST_SUITE=Static
-    - php: 7.3
+    - php: 7.0
+      env: TEST_SUITE=Static
+    - php: 7.4
       os: windows
-    - php: 7.3
-      env: COMPOSER_VERSION=beta
-    - php: 7.3
+    - php: 7.4
+      env: COMPOSER_VERSION=1.9.2
+    - php: 7.4
       env: COMPOSER_VERSION=dev
   allow_failures:
     - os: windows
@@ -60,10 +61,6 @@ notifications:
     on_success: never
     on_failure: always
   webhooks:
-    urls:
-      - https://webhooks.gitter.im/e/c5ef1e9abfc452125de8
-      - https://webhooks.gitter.im/e/c15428595390b938ee38
-      - https://webhooks.gitter.im/e/5126f06d0f4f55230ee0
     on_success: change  # options: [always|never|change] default: always
     on_failure: always  # options: [always|never|change] default: always
     on_start: false     # default: false