Standardise versions

Ran eqc tests

.travis.yml

@@ -1,12 +1,8 @@
 language: erlang
-notifications:
-  webhooks: http://basho-engbot.herokuapp.com/travis?key=a5be8bf3dea048bd7c5c1e93a37da1ab29709f51
-  email: [email protected]
 otp_release:
-  - R15B02
-  - R15B01
-  - R15B
-  - R14B04
-  - R14B03
-# - R15B03
-
+  - 20.3.8
+  - 21.3
+  - 22.3
+script:
+  - chmod u+x rebar3
+  - ./rebar3 do upgrade, compile, xref, dialyzer, eunit

rebar.config

@@ -2,7 +2,7 @@
 {eunit_opts, [verbose]}.
 {so_name, "eleveldb.so"}.
 
-{plugins, [{rebar3_eqc, {git, "https://github.com/Vagabond/rebar3-eqc-plugin", {branch, "master"}}}, pc]}.
+{plugins, [{eqc_rebar, {git, "https://github.com/Quviq/eqc-rebar", {branch, "master"}}}, pc]}.
 
 {provider_hooks,
  [
@@ -22,15 +22,6 @@
 
 {erl_opts, [warnings_as_errors, debug_info]}.
 
-%%
-%% The following 3 lines are only activated during builbot
-%%  unit tests.  The buildbot script executes the following:
-%%    sed -i -e 's/% #!sed //' rebar.config test/eleveldb_schema_tests.erl
-%%
-% #!sed {deps, [
-% #!sed         {cuttlefish, ".*", {git, "git://github.com/basho/cuttlefish.git", {branch, "develop"}}}
-% #!sed        ]}.
-
 {port_env, [
          %% Make sure to set -fPIC when compiling leveldb
              {"CFLAGS", "$CFLAGS -Wall -O3 -fPIC"},