Bump version to 0.18.0 #67

Job	Run time
Upgrade Test	22m 6s
Integration tests with MySQL (8.0.26) / dbtest	5m 8s
Integration tests with MySQL (8.0.25) / dbtest	5m 4s
Integration tests with MySQL (8.0.18) / dbtest	5m 12s
Integration tests with MySQL (8.0.27) / dbtest	4m 38s
Integration tests with MySQL (8.0.28) / dbtest	5m 6s
Integration tests with MySQL (8.0.30) / dbtest	5m 4s
Integration tests with MySQL (8.0.32) / dbtest	4m 34s
Integration tests with MySQL (8.0.31) / dbtest	5m 17s
Integration tests with MySQL (8.0.33) / dbtest	5m 5s
Integration tests with MySQL (8.0.34) / dbtest	4m 44s
Supported Kubernetes versions End-to-End Tests (8.0.34, 1.25.9) / e2e	37m 9s
Supported Kubernetes versions End-to-End Tests (8.0.34, 1.26.4) / e2e	37m 26s
Supported MySQL versions End-to-End Tests (8.0.18, 1.27.1) / e2e	38m 19s
Supported Kubernetes versions End-to-End Tests (8.0.34, 1.27.1) / e2e	36m 16s
Supported MySQL versions End-to-End Tests (8.0.25, 1.27.1) / e2e	38m 55s
Supported MySQL versions End-to-End Tests (8.0.26, 1.27.1) / e2e	38m 22s
Supported MySQL versions End-to-End Tests (8.0.27, 1.27.1) / e2e	36m 42s
Supported MySQL versions End-to-End Tests (8.0.28, 1.27.1) / e2e	36m 23s
Supported MySQL versions End-to-End Tests (8.0.30, 1.27.1) / e2e	38m 49s
Supported MySQL versions End-to-End Tests (8.0.31, 1.27.1) / e2e	38m 21s
Supported MySQL versions End-to-End Tests (8.0.32, 1.27.1) / e2e	38m 36s
Supported MySQL versions End-to-End Tests (8.0.34, 1.27.1) / e2e	37m 48s
Supported MySQL versions End-to-End Tests (8.0.33, 1.27.1) / e2e	39m 59s
	9h 25m 3s

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