Update pg requirement from ~> 0.18 to ~> 1.1

[dependabot-preview[bot]]

Updates the requirements on pg to permit the latest version.

Changelog

*Sourced from [pg's changelog](https://bitbucket.org/ged/ruby-pg/src/master/History.rdoc).* > == v1.1.0 [2018-08-24] Michael Granger > > Deprecated (disable warnings per PG_SKIP_DEPRECATION_WARNING=1): > - Forwarding conn.exec to conn.exec_params is deprecated. > - Forwarding conn.exec_params to conn.exec is deprecated. > - Forwarding conn.async_exec to conn.async_exec_params. > - Forwarding conn.send_query to conn.send_query_params is deprecated. > - Forwarding conn.async_exec_params to conn.async_exec is deprecated. > > PG::Connection enhancements: > - Provide PG::Connection#sync_* and PG::Connection#async_* query methods for explicit calling syncronous or asynchronous libpq API. > - Make PG::Connection#exec and siblings switchable between sync and async API per PG::Connection.async_api= and change the default to async flavors. > - Add async flavors of exec_params, prepare, exec_prepared, describe_prepared and describe_portal. > They are identical to their syncronous counterpart, but make use of PostgreSQL's async API. > - Replace `rb_thread_fd_select()` by faster `rb_wait_for_single_fd()` in `conn.block` and `conn.async_exec` . > - Add PG::Connection#discard_results . > - Raise an ArgumentError for strings containing zero bytes by #escape, #escape_literal, #escape_identifier, #quote_ident and PG::TextEncoder::Identifier. These methods previously truncated strings. > > Result retrieval enhancements: > - Add PG::Result#tuple_values to retrieve all field values of a row as array. > - Add PG::Tuple, PG::Result#tuple and PG::Result#stream_each_tuple . > PG::Tuple offers a way to lazy cast result values. > - Estimate PG::Result size allocated by libpq and notify the garbage collector about it when running on Ruby-2.4 or newer. > - Make the estimated PG::Result size available to ObjectSpace.memsize_of(result) . > > Type cast enhancements: > - Replace Ruby code by a faster C implementation of the SimpleDecoder's timestamp decode functions. github [#20](https://bitbucket.org/ged/ruby-pg/issues/20) > - Interpret years with up to 7 digists and BC dates by timestamp decoder. > - Add text timestamp decoders for UTC vs. local timezone variations. > - Add text timestamp encoders for UTC timezone. > - Add decoders for binary timestamps: PG::BinaryDecoder::Timestamp and variations. > - Add PG::Coder#flags accessor to allow modifications of de- respectively encoder behaviour. > - Add a flag to raise TypeError for invalid input values to PG::TextDecoder::Array . > - Add a text decoder for inet/cidr written in C. > - Add a numeric decoder written in C. > - Ensure input text is zero terminated for text format in PG::Coder#decode . > > Source code enhancements: > - Fix headers and permission bits of various repository files. > > Bugfixes: > - Properly decode array with prepended dimensions. [#272](https://bitbucket.org/ged/ruby-pg/issues/272) > For now dimension decorations are ignored, but a correct Array is returned. > - Array-Decoder: Avoid leaking memory when an Exception is raised while parsing. Fixes [#279](https://bitbucket.org/ged/ruby-pg/issues/279) > > > == v1.0.0 [2018-01-10] Michael Granger > > Deprecated: > - Deprecate Ruby older than 2.2. > ... (truncated)

Commits

- See full diff in [compare view](https://bitbucket.org/ged/ruby-pg/commits/tag/v1.1.0)

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[dependabot-preview[bot]]

Superseded by #385.