Fixes for styleCheck:usages (#16)

* Fixes for styleCheck:usages
* Bump nim 1.2 in CI

.github/workflows/ci.yml

@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        nim: [stable, 1.4.8, 1.2.6]
+        nim: [stable, 1.4.8, 1.2.18]
     steps:
     - uses: actions/checkout@v2
     - uses: iffy/install-nim@v3

config.nims

@@ -1,3 +1,9 @@
+--styleCheck:usages
+if (NimMajor, NimMinor) < (1, 6):
+  --styleCheck:hint
+else:
+  --styleCheck:error
+
 # begin Nimble config (version 1)
 when fileExists("nimble.paths"):
   include "nimble.paths"

questionable/private/binderror.nim

@@ -1,6 +1,6 @@
 import std/options
 
-var captureEnabled {.global, compiletime.}: bool
+var captureEnabled {.global, compileTime.}: bool
 var errorVariable: ptr ref CatchableError
 
 template captureBindError*(error: var ref CatchableError, expression): auto =

questionable/resultsbase.nim

@@ -1,6 +1,6 @@
 template tryImport(module) = import module
 
-when compiles tryimport pkg/result:
+when compiles tryImport pkg/result:
   import pkg/result/../results
 else:
   import pkg/stew/results