travis.yml: test 7.3/7.4/8.0

Author: afk11

.travis.yml

@@ -2,10 +2,9 @@
 language: php
 
 php:
-  - 7.0
-  - 7.1
-  - 7.2
   - 7.3
+  - 7.4
+  - 8.0
 
 env:
   - PHPUNIT=true PHPUNIT_EXT=true BITCOIN_VERSION="0.16.3" SECP256K1_COMMIT="cd329dbc3eaf096ae007e807b86b6f5947621ee3"
@@ -19,14 +18,14 @@ cache:
 
 matrix:
   exclude:
-    - php: 7.2
+    - php: 8.0
       env: PHPUNIT=true PHPUNIT_EXT=true BITCOIN_VERSION="0.16.3" SECP256K1_COMMIT="cd329dbc3eaf096ae007e807b86b6f5947621ee3"
 
   include:
     # add extra test runs for php7: coverage, codestyle, examples, rpc tests
-    - php: 7.2
+    - php: 8.0
       env: COVERAGE=true CODE_STYLE=true EXAMPLES=true PHPUNIT=true PHPUNIT_EXT=true BITCOIN_VERSION="0.16.3" SECP256K1_COMMIT="cd329dbc3eaf096ae007e807b86b6f5947621ee3"
-    - php: 7.0
+    - php: 7.3
       env: RPC_TEST=true BITCOIN_VERSION="0.16.3" SECP256K1_COMMIT="cd329dbc3eaf096ae007e807b86b6f5947621ee3"
 
 install: