[MINOR] 0.3 version bump

This commit concludes RC testing and changes version strings for the 0.3 release for
* the Docker upload script
* the CLI output of 'daphne --version'
* the PyPI package

Godspeed.

containers/publish.sh

@@ -25,7 +25,7 @@ TIMESTAMP_DATE=$(date -I)
 
 # swap comments to tag a specific version
 VERSION=$TIMESTAMP_DATE
-#VERSION=v0.2-rc1
+#VERSION=0.3
 
 # read needed software versions (e.g., CUDA version,...)
 source ../software-package-versions.txt

src/api/internal/daphne_internal.cpp

@@ -75,7 +75,7 @@ void parseScriptArgs(const llvm::cl::list<string>& scriptArgsCli, unordered_map<
 void printVersion(llvm::raw_ostream& os) {
     // TODO Include some of the important build flags into the version string.
     os
-      << "DAPHNE Version 0.2\n"
+      << "DAPHNE Version 0.3\n"
       << "An Open and Extensible System Infrastructure for Integrated Data Analysis Pipelines\n"
       << "https://github.com/daphne-eu/daphne\n";
 }

src/api/python/pyproject.toml

@@ -29,7 +29,7 @@ keywords = [
 dependencies = [
     "pandas",
 ]
-version = "0.3.0-alpha.1"
+version = "0.3.0"
 
 [project.urls]
 Homepage = "https://daphne-eu.eu/"