Fixed equal in if conditions on templates.

Author: srtab

package_monitor/templates/_package.html

@@ -2,6 +2,6 @@
     <td>{{ pv.package_name }}</td>
     <td>{{ pv.current_version }}</td>
     <td>{{ pv.next_version }}</td>
-    <td style="color: {% if pv.diff_status = 'major' %}red{% elif pv.diff_status = 'minor' %}orange{% elif pv.diff_status = 'patch' %}green{% endif %}">{{ pv.latest_version }}</td>
+    <td style="color: {% if pv.diff_status == 'major' %}red{% elif pv.diff_status == 'minor' %}orange{% elif pv.diff_status == 'patch' %}green{% endif %}">{{ pv.latest_version }}</td>
     <td>{{ pv.diff_status }}</td>
 </tr>