fix(spel): manage null result
fix gravitee-io/issues#2439
<gravitee-node.version>1.4.2</gravitee-node.version>
<gravitee-definition.version>1.18.0</gravitee-definition.version>
<gravitee-common.version>1.15.0</gravitee-common.version>
- <gravitee-expression-language.version>1.2.0</gravitee-expression-language.version>
+ <gravitee-expression-language.version>1.3.0-SNAPSHOT</gravitee-expression-language.version>
<gravitee-repository.version>1.25.1</gravitee-repository.version>
<gravitee-plugin-core.version>1.8.0</gravitee-plugin-core.version>
<gravitee-plugin-policy.version>1.8.0</gravitee-plugin-policy.version>
<gravitee-plugin-alert.version>1.8.0</gravitee-plugin-alert.version>
<gravitee-plugin-service-discovery.version>1.8.0</gravitee-plugin-service-discovery.version>
<gravitee-policy-api.version>1.5.0</gravitee-policy-api.version>
- <gravitee-gateway-api.version>1.15.1</gravitee-gateway-api.version>
+ <gravitee-gateway-api.version>1.15.2-SNAPSHOT</gravitee-gateway-api.version>
<gravitee-reporter-api.version>1.14.0</gravitee-reporter-api.version>
<gravitee-alert-api.version>1.1.0</gravitee-alert-api.version>
<gravitee-service-discovery-api.version>1.1.0</gravitee-service-discovery-api.version>
