v6.4.0

Features

• adds getValue to ResultSet (#1073) (7792c90)

Bug Fixes

• allow using case-insensitive user-agent key (#1110) (f4f9e43)
• check for timeout in connection after last statement finished (#1086) (aec0b54), closes #1077
• check for timeout in connection after last statement finished (#1086) (51d753c), closes #1077
• do not keep references to invalidated clients (#1093) (b4595a6), closes #1089
• prevent potential NullPointerException in Struct with Array field that contains null elements (#1107) (c414abb), closes #1106

Dependencies

• update dependency com.google.cloud:google-cloud-monitoring to v2.2.1 (#1104) (37ca990)
• update dependency com.google.cloud:google-cloud-trace to v1.3.3 (#1103) (b4327c0)

Documentation

• fix javadoc for Date type (#1102) (ce095f7)
• use default timeout for restore operation (#1109) (3f3c13e), closes #1019