vendor: update all dependencies

* Update all dependencies
  * Remove all `[[constraint]]` from Gopkg.toml
  * Add in the minimum number of `[[override]]` to build
  * Remove go get of github.com/inconshreveable/mousetrap as it is vendored
  * Update docs with new policy on constraints

vendor/google.golang.org/api/spanner/v1/spanner-gen.go

@@ -688,13 +688,13 @@ type ExecuteSqlRequest struct {
 	// of type `STRING` both appear in params as JSON strings.
 	//
 	// In these cases, `param_types` can be used to specify the exact
-	// SQL type for some or all of the SQL query parameters. See
+	// SQL type for some or all of the SQL statement parameters. See
 	// the
 	// definition of Type for more information
 	// about SQL types.
 	ParamTypes map[string]Type `json:"paramTypes,omitempty"`
 
-	// Params: The SQL query string can contain parameter placeholders. A
+	// Params: The SQL string can contain parameter placeholders. A
 	// parameter
 	// placeholder consists of `'@'` followed by the parameter
 	// name. Parameter names consist of any combination of letters,
@@ -705,7 +705,7 @@ type ExecuteSqlRequest struct {
 	// parameter name can be used more than once, for example:
 	//   "WHERE id > @msg_id AND id < @msg_id + 100"
 	//
-	// It is an error to execute an SQL query with unbound
+	// It is an error to execute an SQL statement with unbound
 	// parameters.
 	//
 	// Parameter values are specified using `params`, which is a JSON
@@ -729,30 +729,29 @@ type ExecuteSqlRequest struct {
 	// be set to QueryMode.NORMAL.
 	//
 	// Possible values:
-	//   "NORMAL" - The default mode where only the query result, without
-	// any information
-	// about the query plan is returned.
-	//   "PLAN" - This mode returns only the query plan, without any result
-	// rows or
+	//   "NORMAL" - The default mode. Only the statement results are
+	// returned.
+	//   "PLAN" - This mode returns only the query plan, without any results
+	// or
 	// execution statistics information.
 	//   "PROFILE" - This mode returns both the query plan and the execution
 	// statistics along
-	// with the result rows.
+	// with the results.
 	QueryMode string `json:"queryMode,omitempty"`
 
 	// ResumeToken: If this request is resuming a previously interrupted SQL
-	// query
+	// statement
 	// execution, `resume_token` should be copied from the
 	// last
 	// PartialResultSet yielded before the interruption. Doing this
-	// enables the new SQL query execution to resume where the last one
+	// enables the new SQL statement execution to resume where the last one
 	// left
 	// off. The rest of the request parameters must exactly match
 	// the
 	// request that yielded this token.
 	ResumeToken string `json:"resumeToken,omitempty"`
 
-	// Sql: Required. The SQL query string.
+	// Sql: Required. The SQL string.
 	Sql string `json:"sql,omitempty"`
 
 	// Transaction: The transaction to use. If none is provided, the default
@@ -1561,7 +1560,7 @@ type PartialResultSet struct {
 	// same session invalidates the token.
 	ResumeToken string `json:"resumeToken,omitempty"`
 
-	// Stats: Query plan and execution statistics for the query that
+	// Stats: Query plan and execution statistics for the statement that
 	// produced this
 	// streaming result set. These can be requested by
 	// setting
@@ -2365,9 +2364,9 @@ type ResultSet struct {
 	// here.
 	Rows [][]interface{} `json:"rows,omitempty"`
 
-	// Stats: Query plan and execution statistics for the query that
-	// produced this
-	// result set. These can be requested by
+	// Stats: Query plan and execution statistics for the SQL statement
+	// that
+	// produced this result set. These can be requested by
 	// setting
 	// ExecuteSqlRequest.query_mode.
 	Stats *ResultSetStats `json:"stats,omitempty"`
@@ -2944,6 +2943,7 @@ func (s *Transaction) MarshalJSON() ([]byte, error) {
 //      read at timestamps in the past. Snapshot read-only
 //      transactions do not need to be committed.
 //
+//
 // For transactions that only read, snapshot read-only
 // transactions
 // provide simpler semantics and are almost always faster.
@@ -3209,7 +3209,10 @@ func (s *Transaction) MarshalJSON() ([]byte, error) {
 // whose
 // timestamp become too old while executing. Reads and SQL queries
 // with
-// too-old read timestamps fail with the error `FAILED_PRECONDITION`.
+// too-old read timestamps fail with the error
+// `FAILED_PRECONDITION`.
+//
+// ##
 type TransactionOptions struct {
 	// ReadOnly: Transaction will not write.
 	//
@@ -3317,6 +3320,14 @@ type Type struct {
 	//   "TIMESTAMP" - Encoded as `string` in RFC 3339 timestamp format. The
 	// time zone
 	// must be present, and must be "Z".
+	//
+	// If the schema has the column option
+	// `allow_commit_timestamp=true`, the placeholder
+	// string
+	// "spanner.commit_timestamp()" can be used to instruct the system
+	// to insert the commit timestamp associated with the
+	// transaction
+	// commit.
 	//   "DATE" - Encoded as `string` in RFC 3339 date format.
 	//   "STRING" - Encoded as `string`.
 	//   "BYTES" - Encoded as a base64-encoded `string`, as described in RFC
@@ -7773,13 +7784,13 @@ type ProjectsInstancesDatabasesSessionsExecuteSqlCall struct {
 	header_           http.Header
 }
 
-// ExecuteSql: Executes an SQL query, returning all rows in a single
-// reply. This
+// ExecuteSql: Executes an SQL statement, returning all results in a
+// single reply. This
 // method cannot be used to return a result set larger than 10 MiB;
 // if the query yields more data than that, the query fails with
 // a `FAILED_PRECONDITION` error.
 //
-// Queries inside read-write transactions might return `ABORTED`.
+// Operations inside read-write transactions might return `ABORTED`.
 // If
 // this occurs, the application should restart the transaction from
 // the beginning. See Transaction for more details.
@@ -7880,7 +7891,7 @@ func (c *ProjectsInstancesDatabasesSessionsExecuteSqlCall) Do(opts ...googleapi.
 	}
 	return ret, nil
 	// {
-	//   "description": "Executes an SQL query, returning all rows in a single reply. This\nmethod cannot be used to return a result set larger than 10 MiB;\nif the query yields more data than that, the query fails with\na `FAILED_PRECONDITION` error.\n\nQueries inside read-write transactions might return `ABORTED`. If\nthis occurs, the application should restart the transaction from\nthe beginning. See Transaction for more details.\n\nLarger result sets can be fetched in streaming fashion by calling\nExecuteStreamingSql instead.",
+	//   "description": "Executes an SQL statement, returning all results in a single reply. This\nmethod cannot be used to return a result set larger than 10 MiB;\nif the query yields more data than that, the query fails with\na `FAILED_PRECONDITION` error.\n\nOperations inside read-write transactions might return `ABORTED`. If\nthis occurs, the application should restart the transaction from\nthe beginning. See Transaction for more details.\n\nLarger result sets can be fetched in streaming fashion by calling\nExecuteStreamingSql instead.",
 	//   "flatPath": "v1/projects/{projectsId}/instances/{instancesId}/databases/{databasesId}/sessions/{sessionsId}:executeSql",
 	//   "httpMethod": "POST",
 	//   "id": "spanner.projects.instances.databases.sessions.executeSql",