Restore caching on macOS runners

Signed-off-by: Sayan Nandan <nandansayan@outlook.com>

.github/workflows/test-pr.yml

@@ -39,8 +39,7 @@ jobs:
           key: ${{ matrix.build }}-cargo-registry-${{ hashFiles('**/Cargo.lock') }}
           restore-keys: |
             ${{ matrix.build }}-cargo-registry-
-          # HACK(@ohsayan): The next line skips caching until it is fixed
-        if: runner.os != 'macOS' && env.BUILD == 'true'
+        if: env.BUILD == 'true'
 
       - name: Cache Cargo index
         uses: actions/cache@v1
@@ -49,8 +48,7 @@ jobs:
           key: ${{ matrix.build }}-cargo-index-${{ hashFiles('**/Cargo.lock') }}
           restore-keys: |
             ${{ matrix.build }}-cargo-index-
-          # HACK(@ohsayan): The next line skips caching until it is fixed
-        if: runner.os != 'macOS' && env.BUILD == 'true'
+        if: env.BUILD == 'true'
 
       - name: Cache Cargo build
         uses: actions/cache@v1
@@ -59,8 +57,7 @@ jobs:
           key: ${{ matrix.build }}-target-${{ hashFiles('**/Cargo.lock') }}
           restore-keys: |
             ${{ matrix.build }}-target-
-          # HACK(@ohsayan): The next line skips caching until it is fixed
-        if: runner.os != 'macOS' && env.BUILD == 'true'
+        if: env.BUILD == 'true'
 
       - name: Install Rust
         run: |

.github/workflows/test-push.yml

@@ -45,8 +45,7 @@ jobs:
           key: ${{ matrix.build }}-cargo-registry-${{ hashFiles('**/Cargo.lock') }}
           restore-keys: |
             ${{ matrix.build }}-cargo-registry-
-          # HACK(@ohsayan): The next line skips caching until it is fixed
-        if: runner.os != 'macOS' && env.IS_MD_FILE == 'false'
+        if: env.IS_MD_FILE == 'false'
 
       - name: Cache Cargo index
         uses: actions/cache@v1
@@ -55,8 +54,7 @@ jobs:
           key: ${{ matrix.build }}-cargo-index-${{ hashFiles('**/Cargo.lock') }}
           restore-keys: |
             ${{ matrix.build }}-cargo-index-
-          # HACK(@ohsayan): The next line skips caching until it is fixed
-        if: runner.os != 'macOS' && env.IS_MD_FILE == 'false'
+        if: env.IS_MD_FILE == 'false'
 
       - name: Cache Cargo build
         uses: actions/cache@v1
@@ -65,8 +63,7 @@ jobs:
           key: ${{ matrix.build }}-target-${{ hashFiles('**/Cargo.lock') }}
           restore-keys: |
             ${{ matrix.build }}-target-
-          # HACK(@ohsayan): The next line skips caching until it is fixed
-        if: runner.os != 'macOS' && env.IS_MD_FILE == 'false'
+        if: env.IS_MD_FILE == 'false'
 
       - name: Install Rust
         run: |