Enable unit tests by default

Also documents how to run the tests.

Signed-off-by: Jim Ramsay <i.am@jimramsay.com>

CONTRIBUTING.md

@@ -29,6 +29,13 @@ as far as coding style is concererned, with the following exceptions:
    a lot of code that uses aligned argument lists in the project, but I have
    come to the conclusion that these alignments are not very nice to maintain.
 
+## Unit Tests
+
+wayvnc has a small but growing set of unit tests, which are run on every GitHub PR. To run them locally, do the following:
+```bash
+meson test -C build
+```
+
 ## No Brown M&Ms
 
 All pull requests must contain the following sentence in the description:

README.md

@@ -103,6 +103,11 @@ meson build
 ninja -C build
 ```
 
+To run the unit tests:
+```
+meson test -C build
+```
+
 ## Running
 Wayvnc can be run from the build directory like so:
 ```

meson_options.txt

@@ -6,5 +6,5 @@ option('man-pages', type: 'feature', value: 'auto',
 	description: 'Generate and install man pages')
 option('systemtap', type: 'boolean', value: false,
 	description: 'Enable tracing using sdt')
-option('tests', type: 'boolean', value: false,
+option('tests', type: 'boolean', value: true,
 	description: 'Build unit tests')