travis: Fill in the test matrix

The plugins will have to run in a number of different configurations, so let's
test them.

.travis.yml

@@ -4,6 +4,16 @@ dist: bionic
 notifications:
   email: false
 
+env:
+ - COMPAT=0 DEVELOPER=0 EXPERIMENTAL_FEATURES=0
+ - COMPAT=0 DEVELOPER=0 EXPERIMENTAL_FEATURES=1
+ - COMPAT=0 DEVELOPER=1 EXPERIMENTAL_FEATURES=0
+ - COMPAT=0 DEVELOPER=1 EXPERIMENTAL_FEATURES=1
+ - COMPAT=1 DEVELOPER=0 EXPERIMENTAL_FEATURES=0
+ - COMPAT=1 DEVELOPER=0 EXPERIMENTAL_FEATURES=1
+ - COMPAT=1 DEVELOPER=1 EXPERIMENTAL_FEATURES=0
+ - COMPAT=1 DEVELOPER=1 EXPERIMENTAL_FEATURES=1
+
 cache:
   directories:
     - dependencies

.travis/build.sh

@@ -41,7 +41,7 @@ git clone --recursive https://github.com/ElementsProject/lightning.git /tmp/ligh
 if [ ! -f "$CWD/dependencies/usr/local/bin/lightningd" ]; then
     (
 	cd /tmp/lightning && \
-	./configure --enable-developer --disable-valgrind --enable-experimental-features && \
+	./configure --disable-valgrind && \
 	make -j 8 DESTDIR=dependencies/
     )
 fi