v1.2.0

Fix

(#150) Fixed bug in Treadles internal default test directory naming
(#153) Fixes incomplete match specification of a datastore plugin in repl
(#154) Fixes for problem discovered in riscv-mini
(#156) Fix code analysis problem introduced with #154
(#157) The vcd filename can be wrong
(#159) Make printf behavior more closely match verilator
(#166) VCD fixes and improvements

Feature

(#145) Testers2 boring fix
(#152) Provide API for getting stop result in from treadle tester
(#155) Makes treadle printf output formatted more like verilator does
(#160) Add the current .scalafmt.conf
(#161) Vcd diff upgrade 2
(#162) Vcd update 3
(#163) Relicense under Apache 2.0
(#164) Add scalastyle plugin
(#165) Allows setting the initial phase offset for the clock to zero
(#167) Bump sbt and tool/plugin dependencies.
(#169) Update junit to 4.13
(#170) Update sbt to 1.3.8
(#171) Update scalacheck to 1.14.3
(#175) Update scalatest to 3.1.1
(#177) Gives symbol table a mapping between instance names and module names
(#179) Don't mess with version management.
(#181) Bump to Scala 2.12.10
(#188) Make scala-steward run on the first of each month
(#190) Update sbt to 1.3.10
(#192) Add github action/workflow testing
(#191) Address Scala 2.11 issue; add missing import.
(#187) Treadle clean up.
(#182) Return to using LowFirrtlOptimization