[gnome-shell-extensions] build: Bump js-shell used for syntax checks

[Florian Müllner <fmuellner src gnome org>]

commit 4655cde002b365dafdbdee9ff65ac66862fcdd87
Author: Florian Müllner <fmuellner gnome org>
Date:   Mon Jan 28 04:31:31 2019 +0100

    build: Bump js-shell used for syntax checks
    
    gjs moved from SpiderMonkey 52 to 60 during the last cycle, it's time
    we follow suit.

 .gitlab-ci.yml         | 2 +-
 extensions/meson.build | 4 ++--
 meson.build            | 2 +-
 3 files changed, 4 insertions(+), 4 deletions(-)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index a470d65..74995b2 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -4,7 +4,7 @@ stages:
  - build
 
 before_script:
-  - dnf install -y meson gettext mozjs52-devel
+  - dnf install -y meson gettext mozjs60-devel
 
 build-shell-extensions:
   stage: build
diff --git a/extensions/meson.build b/extensions/meson.build
index ed19675..2b013fc 100644
--- a/extensions/meson.build
+++ b/extensions/meson.build
@@ -33,11 +33,11 @@ install_data (extension_schemas,
 )
 
 foreach js_source : js_sources
-  if (js52.found())
+  if (js60.found())
     path_array = '@0@'.format(js_source).split('/')
     name = join_paths(path_array[-2], path_array[-1])
 
-    test('Checking syntax of ' + name, js52,
+    test('Checking syntax of ' + name, js60,
       args: ['-s', '-c', js_source],
       workdir: meson.current_source_dir()
     )
diff --git a/meson.build b/meson.build
index 9ef8cfd..36464b6 100644
--- a/meson.build
+++ b/meson.build
@@ -22,7 +22,7 @@ xsessiondir = join_paths(datadir, 'xsessions')
 
 extensionlib = files('lib/convenience.js')
 
-js52 = find_program('js52', required: false)
+js60 = find_program('js60', required: false)
 
 ver_arr = meson.project_version().split('.')
 if ver_arr[1].to_int().is_even()