Remove old Nim versions from Nimble CI

Nim version containing changes from commit
`8ede3bc0494aa27d98384fa5449c5c3026ac8f92` is required for successful
build of latest Nimble.

Related to #127

.github/workflows/test.yml

@@ -11,9 +11,7 @@ jobs:
           - macos-latest
           - ubuntu-latest
         nimversion:
-          - 1.2.8
-          - 1.4.2
-          - nightly:https://github.com/nim-lang/nightlies/releases/tag/2021-02-06-devel-39230422d02bd41b02378211e8613f702e5b945c
+          - nightly:https://github.com/bobeff/Nim/tree/feature/nimble-lockfile-support
     name: ${{ matrix.os }} - ${{ matrix.nimversion }}
     runs-on: ${{ matrix.os }}
     env:

.travis.yml

@@ -6,11 +6,8 @@ os:
 language: c
 
 env:
-  - BRANCH=0.20.2
-  - BRANCH=1.0.8
-  - BRANCH=1.2.6
   # This is the latest working Nim version against which Nimble is being tested
-  - BRANCH=#8a004e2
+  - BRANCH=#8ede3bc
 
 cache:
   directories:

tests/.gitignore

@@ -1,23 +1,3 @@
-tcheckcommand
-tdevelopfeature
-tester
-testscommon
-tissues
-tlocaldeps
-tlockfile
-tmisctests
-tmoduletests
-tmultipkgs
-tnimbledump
-tnimblerefresh
-tnimscript
-tpathcommand
-treversedeps
-truncommand
-tsetupcommand
-ttestcommand
-ttwobinaryversions
-tuninstall
 /nimble-test
 /buildDir
 /binaryPackage/v1/binaryPackage