Fix OSGi manifest

[marcphilipp]

Below is a diff of the sorted manifests from 1.2.0 and 1.3.0-RC1:

4,8c4,8
< Archive:  opentest4j-1.2.0.jar
< Bnd-LastModified: 1559849033747
< Build-Date: 2019-06-06
< Build-Revision: 75136304fab712895090c9c4678dc72ccbcb5e21
< Build-Time: 21:23:52.218+0200
---
> Archive:  opentest4j-1.3.0-RC1.jar
> Bnd-LastModified: 1685537848988
> Build-Date: 2023-05-31
> Build-Revision: 303a544de219a7cb1c5acbf7f475cd86cfe9a460
> Build-Time: 14:57:26.320+0200
13c13
< Bundle-SymbolicName: org.opentest4j
---
> Bundle-SymbolicName: opentest4j
15,17c15,16
< Bundle-Version: 1.2.0
< Created-By: 11.0.2 (Oracle Corporation 11.0.2+9)
< Export-Package: org.opentest4j;version="1.2.0"
---
> Bundle-Version: 1.3.0.RC1
> Created-By: 17.0.5 (BellSoft)
20c19
< Implementation-Version: 1.2.0
---
> Implementation-Version: 1.3.0-RC1
21a21
> Private-Package: org.opentest4j
25,26c25,26
< Specification-Version: 1.2.0
< Tool: Bnd-4.0.0.201805111645
---
> Specification-Version: 1.3.0
> Tool: Bnd-6.4.0.202211291949

Looks like at least Bundle-SymbolicName and Export-Package/Private-Package need to be fixed.