Bug 571550 - Correct lower bound of import for gson in o.e.tips.json

Commit 5c2fb648 made use of API available only as of gson 2.8.6.

Change-Id: I743dafdf7c88ffe2209d74615f522fac3276b784
Signed-off-by: Thomas Wolf <thomas.wolf@paranor.ch>
diff --git a/org.eclipse.tips.json/META-INF/MANIFEST.MF b/org.eclipse.tips.json/META-INF/MANIFEST.MF
index fd82207..f94a065 100644
--- a/org.eclipse.tips.json/META-INF/MANIFEST.MF
+++ b/org.eclipse.tips.json/META-INF/MANIFEST.MF
@@ -11,5 +11,5 @@
  org.eclipse.tips.json.internal;x-internal:=true
 Bundle-ClassPath: .
 Automatic-Module-Name: org.eclipse.tips.json
-Import-Package: com.google.gson;version="[2.0.0,3.0.0)"
+Import-Package: com.google.gson;version="[2.8.6,3.0.0)"
 Bundle-Vendor: %Bundle-Vendor